Hydrocarbon Processing - September 2022 - 135
100th Anniversary
Industry Pioneers
LEE NICHOLS, VP, Content/Editor-in-Chief and
SUMEDHA SHARMA, Technical Editor
Industry Pioneers: The people that have advanced
the HPI for more than 150 yr
CARL VON LINDE
Carl von Linde was a German scientist and engineer
who pioneered new technologies in refrigeration
and the invention of air separation and
gas liquefaction processes. In the 1870s, Linde's
studies led to an efficient design for refrigeration.
The first iteration used methyl ether, which
was later switched to ammonia. Towards the end of the 1870s,
Linde and five partners established the Gesellschaft fur Linde's
Eismaschinen (Linde's Ice Machine Co.) in Wiesbaden, Germany.
The novel refrigeration device was of extreme importance,
especially to the beer brewing industry, as well as the meat
industry and cold storage facilities. These inventions quickly replaced
ice in many industries, especially in food handling.
In the early 1890s, Linde research shifted to low-temperature
refrigeration and the liquefaction of air. This included the technique
of obtaining pure oxygen and nitrogen by fractional distillation
of liquefied air. In 1895, he successfully liquefied air by compressing
it and then letting it expand rapidly, which cooled it. This
enabled him to obtain oxygen and nitrogen from the liquified air
by slow warming.1
Several years later, he invented a method for
These discoveries led to the creation
separating pure liquid oxygen from liquid air, which provided oxygen
to various industries.2
of Linde Air Products in the U.S. in 1907, which later became part
of the Union Carbide company at the beginning of World War I.3
ABRAHAM GESNER
The Canadian geologist and physician, Abraham
Gesner, is credited with the invention of kerosene.
In the mid-1830s, he worked as a provincial
geologist in New Brunswick, Canada, examining
coal in the province. In the 1840s, he began
experimenting with hydrocarbons, especially bitumen
from Trinidad. From these experiments, he developed a
process to extract oil, which could be burned. However, the bitumen
product was expensive to obtain and the burning of it produced
a horrendous odor. Therefore, he started experimenting
with a type of asphalt called albertite. Gessner noticed that the
oil that was extracted-the process was done by heating coal in
a retort4
-burned with a strong yellow flame with no odor.
In 1854, Gesner obtained three U.S. patents for his kerosene
fuel and set up the North American Kerosene Gas Light
Co. on Long Island, New York (U.S.). The company prospered
and kerosene began to be the go-to fuel for lamp lighting, replacing
whale oil.
SAMUEL KIER
Samuel Kier was an American inventor and is
thought of as the founder of the American refining
industry. Several years after Gesner's discovery
of kerosene, Samuel Kier began his own experimentation
on petroleum that would seep into
his family's salt wells near Pittsburgh, Pennsylvania
(U.S.)-at the time, this substance was known as " carbon oil. "
Although the substance could be burned for lighting, much like
Gesner's experiments with bitumen from Trinidad, the unrefined
material had an unpleasant odor. Instead, Kier used the material
for medicinal purposes until it lost its appeal in the early 1850s.
To find another path for the oily substance, Kier experimented
with using the substance for lighting. On the recommendation
of James Booth, a chemist and professor from Philadelphia,
Pennsylvania (U.S.), Kier used distillation to extract the best materials
for the use of lamp burning fuel. In 1851, Kier began selling
his lamp fuel oil for $1.50/gal, a more cost-effective product
than whale oil. As demand grew, Kier established North America's
first oil refinery in 1853, which processed 1 bpd-2 bpd of
liquid petroleum in its first year, growing to 5 bpd in 1854. The
effects of Kier's refinery not only led Pittsburgh to become the
first U.S. city to be illuminated by petroleum, but also led to the
start of the country's refining industry.
MARCUS SAMUEL, SAMUEL SAMUEL
In 1870s, the Samuel brothers inherited
their father's import-export
business. At the time, their
father (Marcus Samuel) built a
prosperous business of importing
shells from the Far East to be
used in interior design.
Around 1880, the Samuel brothers expanded their father's
business to include exporting oil around the world. However, a
challenge at the time was oil containers and space on a marine
vessel. Oil barrels were prone to leak and took up a lot of space
on oceangoing vessels. To overcome this challenge, they commissioned
a fleet of steamers to carry the oil in bulk.5
Just as the
brothers were revolutionizing crude oil trade, they began to include
shipping kerosene to demand centers around the world.
In 1896, the brothers renamed the company Shell Transport
and Trading Co.
By the late 1890s, business was booming, and the the company
established its first refinery in Balikpapan, Indonesia in 1897
Hydrocarbon Processing's Centennial Anniversary | SEPTEMBER 2022 135
Hydrocarbon Processing - September 2022
Table of Contents for the Digital Edition of Hydrocarbon Processing - September 2022
Contents
Hydrocarbon Processing - September 2022 - Cover1
Hydrocarbon Processing - September 2022 - Cover2
Hydrocarbon Processing - September 2022 - Contents
Hydrocarbon Processing - September 2022 - 4
Hydrocarbon Processing - September 2022 - 5
Hydrocarbon Processing - September 2022 - 6
Hydrocarbon Processing - September 2022 - 7
Hydrocarbon Processing - September 2022 - 8
Hydrocarbon Processing - September 2022 - 9
Hydrocarbon Processing - September 2022 - 10
Hydrocarbon Processing - September 2022 - 11
Hydrocarbon Processing - September 2022 - 12
Hydrocarbon Processing - September 2022 - 13
Hydrocarbon Processing - September 2022 - 14
Hydrocarbon Processing - September 2022 - 15
Hydrocarbon Processing - September 2022 - 16
Hydrocarbon Processing - September 2022 - 17
Hydrocarbon Processing - September 2022 - 18
Hydrocarbon Processing - September 2022 - 19
Hydrocarbon Processing - September 2022 - 20
Hydrocarbon Processing - September 2022 - 21
Hydrocarbon Processing - September 2022 - 22
Hydrocarbon Processing - September 2022 - 23
Hydrocarbon Processing - September 2022 - 24
Hydrocarbon Processing - September 2022 - 25
Hydrocarbon Processing - September 2022 - 26
Hydrocarbon Processing - September 2022 - 27
Hydrocarbon Processing - September 2022 - 28
Hydrocarbon Processing - September 2022 - 29
Hydrocarbon Processing - September 2022 - 30
Hydrocarbon Processing - September 2022 - 31
Hydrocarbon Processing - September 2022 - 32
Hydrocarbon Processing - September 2022 - 33
Hydrocarbon Processing - September 2022 - 34
Hydrocarbon Processing - September 2022 - 35
Hydrocarbon Processing - September 2022 - 36
Hydrocarbon Processing - September 2022 - 37
Hydrocarbon Processing - September 2022 - 38
Hydrocarbon Processing - September 2022 - 39
Hydrocarbon Processing - September 2022 - 40
Hydrocarbon Processing - September 2022 - 41
Hydrocarbon Processing - September 2022 - 42
Hydrocarbon Processing - September 2022 - 43
Hydrocarbon Processing - September 2022 - 44
Hydrocarbon Processing - September 2022 - 45
Hydrocarbon Processing - September 2022 - 46
Hydrocarbon Processing - September 2022 - 47
Hydrocarbon Processing - September 2022 - 48
Hydrocarbon Processing - September 2022 - 49
Hydrocarbon Processing - September 2022 - 50
Hydrocarbon Processing - September 2022 - 51
Hydrocarbon Processing - September 2022 - 52
Hydrocarbon Processing - September 2022 - 53
Hydrocarbon Processing - September 2022 - 54
Hydrocarbon Processing - September 2022 - 55
Hydrocarbon Processing - September 2022 - 56
Hydrocarbon Processing - September 2022 - 57
Hydrocarbon Processing - September 2022 - 58
Hydrocarbon Processing - September 2022 - 59
Hydrocarbon Processing - September 2022 - 60
Hydrocarbon Processing - September 2022 - 61
Hydrocarbon Processing - September 2022 - 62
Hydrocarbon Processing - September 2022 - 63
Hydrocarbon Processing - September 2022 - 64
Hydrocarbon Processing - September 2022 - 65
Hydrocarbon Processing - September 2022 - 66
Hydrocarbon Processing - September 2022 - 67
Hydrocarbon Processing - September 2022 - 68
Hydrocarbon Processing - September 2022 - 69
Hydrocarbon Processing - September 2022 - 70
Hydrocarbon Processing - September 2022 - 71
Hydrocarbon Processing - September 2022 - 72
Hydrocarbon Processing - September 2022 - 73
Hydrocarbon Processing - September 2022 - 74
Hydrocarbon Processing - September 2022 - 75
Hydrocarbon Processing - September 2022 - 76
Hydrocarbon Processing - September 2022 - 77
Hydrocarbon Processing - September 2022 - 78
Hydrocarbon Processing - September 2022 - 79
Hydrocarbon Processing - September 2022 - 80
Hydrocarbon Processing - September 2022 - 81
Hydrocarbon Processing - September 2022 - 82
Hydrocarbon Processing - September 2022 - 83
Hydrocarbon Processing - September 2022 - 84
Hydrocarbon Processing - September 2022 - 85
Hydrocarbon Processing - September 2022 - 86
Hydrocarbon Processing - September 2022 - 87
Hydrocarbon Processing - September 2022 - 88
Hydrocarbon Processing - September 2022 - 89
Hydrocarbon Processing - September 2022 - 90
Hydrocarbon Processing - September 2022 - 91
Hydrocarbon Processing - September 2022 - 92
Hydrocarbon Processing - September 2022 - 93
Hydrocarbon Processing - September 2022 - 94
Hydrocarbon Processing - September 2022 - 95
Hydrocarbon Processing - September 2022 - 96
Hydrocarbon Processing - September 2022 - 97
Hydrocarbon Processing - September 2022 - 98
Hydrocarbon Processing - September 2022 - 99
Hydrocarbon Processing - September 2022 - 100
Hydrocarbon Processing - September 2022 - 101
Hydrocarbon Processing - September 2022 - 102
Hydrocarbon Processing - September 2022 - 103
Hydrocarbon Processing - September 2022 - 104
Hydrocarbon Processing - September 2022 - 105
Hydrocarbon Processing - September 2022 - 106
Hydrocarbon Processing - September 2022 - 107
Hydrocarbon Processing - September 2022 - 108
Hydrocarbon Processing - September 2022 - 109
Hydrocarbon Processing - September 2022 - 110
Hydrocarbon Processing - September 2022 - 111
Hydrocarbon Processing - September 2022 - 112
Hydrocarbon Processing - September 2022 - 113
Hydrocarbon Processing - September 2022 - 114
Hydrocarbon Processing - September 2022 - 115
Hydrocarbon Processing - September 2022 - 116
Hydrocarbon Processing - September 2022 - 117
Hydrocarbon Processing - September 2022 - 118
Hydrocarbon Processing - September 2022 - 119
Hydrocarbon Processing - September 2022 - 120
Hydrocarbon Processing - September 2022 - 121
Hydrocarbon Processing - September 2022 - 122
Hydrocarbon Processing - September 2022 - 123
Hydrocarbon Processing - September 2022 - 124
Hydrocarbon Processing - September 2022 - 125
Hydrocarbon Processing - September 2022 - 126
Hydrocarbon Processing - September 2022 - 127
Hydrocarbon Processing - September 2022 - 128
Hydrocarbon Processing - September 2022 - 129
Hydrocarbon Processing - September 2022 - 130
Hydrocarbon Processing - September 2022 - 131
Hydrocarbon Processing - September 2022 - 132
Hydrocarbon Processing - September 2022 - 133
Hydrocarbon Processing - September 2022 - 134
Hydrocarbon Processing - September 2022 - 135
Hydrocarbon Processing - September 2022 - 136
Hydrocarbon Processing - September 2022 - 137
Hydrocarbon Processing - September 2022 - 138
Hydrocarbon Processing - September 2022 - 139
Hydrocarbon Processing - September 2022 - 140
Hydrocarbon Processing - September 2022 - 141
Hydrocarbon Processing - September 2022 - 142
Hydrocarbon Processing - September 2022 - 143
Hydrocarbon Processing - September 2022 - 144
Hydrocarbon Processing - September 2022 - 145
Hydrocarbon Processing - September 2022 - 146
Hydrocarbon Processing - September 2022 - Cover3
Hydrocarbon Processing - September 2022 - Cover4
https://www.nxtbook.com/gulfenergyinfo/gulfpub/HPI-Market-Data-2023-v3
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hpi-market-data-2024-v2
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hpi-market-data-2024
https://www.nxtbook.com/gulfenergyinfo/gulfpub/gas-processes-handbook-2022_v2
https://www.nxtbook.com/gulfenergyinfo/gulfpub/gas-processes-handbook-2022
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hp_202212
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hpi-market-data-2023-v2
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hpi-market-data-2023
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hp_202211
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202210
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202209
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202208
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202207_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202207
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202206_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202206
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202205_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202205
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202204_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202204
https://www.nxtbook.com/nxtbooks/gulfpub/hp_032022
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202203
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202202
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202201
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202112
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202111
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202110
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2022_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2022
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202109
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202108
https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_processes_handbook_2021_v2
https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_processes_handbook_2021
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202107
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202106
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202105
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202104
https://www.nxtbook.com/nxtbooks/gulfpub/hp_ebooks
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202103
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202102
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202101
https://www.nxtbook.com/nxtbooks/gulfpub/catalyst_handbook_2020_v2
https://www.nxtbook.com/nxtbooks/gulfpub/catalyst_handbook_2020
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202012
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202011
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202010
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2021
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202009
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202008
https://www.nxtbook.com/nxtbooks/gulfpub/refining_processes_handbook_2020
https://www.nxtbook.com/nxtbooks/gulfpub/refining_processes_handbook_2020_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202007
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202006
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202005
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202004
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202003
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202002
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202001
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201912
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201911
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2020_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2020
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201910
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201909
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201908
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201907
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201906
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201905
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201904
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201903
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201902
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201901
https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_2018_v2
https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_2018
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201812
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2019_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2019
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201811
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201810
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201809
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201808
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201807
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201806
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201805
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201804
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201803
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201802
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201801
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201712
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201711
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201710
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201709
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201708
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201707
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201706
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201705
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201704
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201703
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201702
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201701
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2017mediaplanner
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201612
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201611
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201610
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201609
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201608
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201607
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201606
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201605
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201604
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201603
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201602
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201601
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201512
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201511
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201510
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2016mediaplanner
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201509
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201508
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201507
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2015tmsd
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201506
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201505
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201504
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201503
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201502
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201501
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201412
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201411
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2015mediaplanner
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201410
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201409
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201408
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201407
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2014petrochemicalprocesses_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2014petrochemicalprocesses
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201406
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201405
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201404
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201403
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2014calendar
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201402
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201401
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201312
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2014mediaplanner
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201311
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201310
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201309
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201308
https://www.nxtbook.com/nxtbooks/gulfpub/hp_srsguide2013
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201307
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201306
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201305
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201304
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201303
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201302
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201301
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201212
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201211
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201210
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201209
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201208
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201207
https://www.nxtbook.com/nxtbooks/gulfpub/hp_srsguide2012
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201206
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201205
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201204
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201203
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201202
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201201
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201112
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201111
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201110
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201109
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201108
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201107_srsguide
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201107
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201106
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201105
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201104
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201103
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201102
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201101
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201012
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201011
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201010
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201009
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201008
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201007
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201006
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201005
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201004
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201003
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201002
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201001
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200912
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200911
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200910
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200909
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200908
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200907
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200906
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200905
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200904
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200903
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200902
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200901
https://www.nxtbookmedia.com