Theatre Design & Technology - Fall 1982 - 11

we were finally able to introduce a heat
removing socket which our tests show
will deliver specified lamp life.
When used in ellipsoidal systems.
tungsten-halogen lamps. as manufactured. do not hold tight enough
tolerances for the fi lament position of
the lamp. Hence the requirement for the
new rapid adjustment controls provided
on the instruments. so that field adjustments can be made whenever a new
lamp is put in. But even on a spotlight
newly relamped. aimed and focused,
offsets occur during the life of the particular lamp. Filament droop during
burning becomes significantly serious to
affect efficiency and beam distribution
even though the lamp is still alight. If we
are to stay with the tungsten filament
lamp for theatre lighting we may be at a
point when we must closely reexamine
the design of the fixture. which now is
largely frozen in the cold reality of "as
inexpensive as possible."
Start with the fact that the heat produced should be removed and dissipated very early on in the system and in
a manner not suggested by any present
design. Were it possible to remove this
heat. even were it terribly expensive to
remove this heat. radical changes could
take place both in the downward sizing
of present fixtures as well as in increases
in efficiency. Body materials and shapes
could change drastically. Lenses could
be made of plastic. or perhaps even of
liquid in a reshapeable enclosure. allowing for efficient multifocus systems.
Variable color control could be a part
of this new low temperature spotlight.
Because the entire system would have
less weight and bulk and because the optical controls would be less "sticky."
refocusing and re-aiming mechanisms
would become more cost effective and
lend themselves to interfacing with the
lighting control desk.
Of course. it is also possible to
change the light source in theatrical
equipment. gaining theoretical starting
efficiencies of 80 to 120 lumens per watt
rather than 20-25 lumens per watt as
with the tungsten filament. Presently
such sources are associated with a considerable amount of starting and ballast
circuitry which is not only bulky and expensive but noisy as well. Such equipment lends itself best at present to nonelectrical dimming means. such as
mechanical shutters and dousers. Compactness is still a relative problem until
some sophisticated means is found to
remove the still substantial amount of
heat generated by the lamp.
USITI Fall. 1982

I think in theatre. as opposed to
some other media - rock. television.
and film for example. the market pressure is downward as regards price.
Television and film people demand better mechanical assemblies. more rugged
equipment. and they are more willing to
pay for superior equipment. Rock people pay for "troupe-ability."
It's strange that the purchaser of
lighting equipment seems not to recognize that by the time he has replaced his
tungsten lamp four to six times. in most
cases he has paid for the equipment
again - and in metal halide units one or

two lamp replacements may well represent initial equipment cost. That's why
"cheap" equipment may seemingly
represent a best buy. but in actuality its
final cost may be very dear. The cost of
the initial lighting fixture complement in
a typical installation represents at best
only 20-25% of the total lighting equipment to be purchased. But a greater investment in this area to start. might. in
fact. reduce the life-long costs of operation.
When
queried several lighting
designers on the point as to needed
Theatre Design & Technology

9



Table of Contents for the Digital Edition of Theatre Design & Technology - Fall 1982

Contents
Theatre Design & Technology - Fall 1982 - 1
Theatre Design & Technology - Fall 1982 - 2
Theatre Design & Technology - Fall 1982 - 3
Theatre Design & Technology - Fall 1982 - Contents
Theatre Design & Technology - Fall 1982 - 5
Theatre Design & Technology - Fall 1982 - 6
Theatre Design & Technology - Fall 1982 - 7
Theatre Design & Technology - Fall 1982 - 8
Theatre Design & Technology - Fall 1982 - 9
Theatre Design & Technology - Fall 1982 - 10
Theatre Design & Technology - Fall 1982 - 11
Theatre Design & Technology - Fall 1982 - 12
Theatre Design & Technology - Fall 1982 - 13
Theatre Design & Technology - Fall 1982 - 14
Theatre Design & Technology - Fall 1982 - 15
Theatre Design & Technology - Fall 1982 - 16
Theatre Design & Technology - Fall 1982 - 17
Theatre Design & Technology - Fall 1982 - 18
Theatre Design & Technology - Fall 1982 - 19
Theatre Design & Technology - Fall 1982 - 20
Theatre Design & Technology - Fall 1982 - 21
Theatre Design & Technology - Fall 1982 - 22
Theatre Design & Technology - Fall 1982 - 23
Theatre Design & Technology - Fall 1982 - 24
Theatre Design & Technology - Fall 1982 - 25
Theatre Design & Technology - Fall 1982 - 26
Theatre Design & Technology - Fall 1982 - 27
Theatre Design & Technology - Fall 1982 - 28
Theatre Design & Technology - Fall 1982 - 29
Theatre Design & Technology - Fall 1982 - 30
Theatre Design & Technology - Fall 1982 - 31
Theatre Design & Technology - Fall 1982 - 32
Theatre Design & Technology - Fall 1982 - 33
Theatre Design & Technology - Fall 1982 - 34
Theatre Design & Technology - Fall 1982 - 35
Theatre Design & Technology - Fall 1982 - 36
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2020winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2020winter_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2019fall_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2019fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2019summer_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2019summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2019spring_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2019spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/usitt_techexpoguide_2019_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/usitt_techexpoguide_2019
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2019winter_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2019winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2018fall_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2018fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2018summer_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2018summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2018spring_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2018spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2018winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2017fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2017fall_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2017summer_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2017summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2017spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2017spring_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/usitt_techexpoguide_2017_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/usitt_techexpoguide_2017
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2017winter_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2017winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2016fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2016summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2016spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2016spring_public
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2016winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2015fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2015summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2015spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2015winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2014fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2014summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2013winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2013summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2013fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2013spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2012winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2012fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2012summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2012spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2011winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2011fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2011summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2011spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2010winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2010fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2010summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2010spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2009winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2009fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2009summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2009spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2008winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2008fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2008summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2008spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2007winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2007fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2007summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2007spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2006winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2006fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2006summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2006spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2005winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2005fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2005summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2005spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2004winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2004fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2004summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2004spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2003winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2003fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2003summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2003spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2002winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2002fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2002summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2002spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2001winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2001fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2001summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2001spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2000winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2000fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2000summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_2000spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1999winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1999fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1999summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1999spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1998winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1998fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1998summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1998spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1997winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1997fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1997summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1997spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1996winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1996fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1996summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1996spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1995winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1995fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1995summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1995spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1994winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1994fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1994summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1994spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1993winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1993fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1993summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1993spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1992winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1992fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1992summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1992spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1991winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1991fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1991summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1991spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1990fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1990summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1990spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1989winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1989fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1989summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1989spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1988winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1988winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1988fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1988summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1988spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1987winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1987fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1987summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1987spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1986winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1986fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1986summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1986spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1985winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1985fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1985summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1985spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1984fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1984summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1984spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1983winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1983fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1983summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1983spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1982winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1982fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1982summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1982spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1981winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1981fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1981summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1981spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1980winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1980fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1980summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1980spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1979winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1979fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1979summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1979spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1978winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1978fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1978summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1978spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1977winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1977fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1977summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1977spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1976winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1976fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1976summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1976spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1975winter
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1975fall
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1975summer
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1975spring
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1974Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1974Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1974May
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1974Feb
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1973Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1973Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1973May
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1973Feb
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1972Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1972Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1972May
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1972Feb
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1971Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1971Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1971May
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1971Feb
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1970Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1970Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1970May
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1970Feb
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1969Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1969Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1969May
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1969Feb
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1968Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1968Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1968May
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1968Feb
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1967Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1967Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1967May
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1967Feb
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966May
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1966Feb
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965Dec
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965Oct
http://www.nxtbook.com/nxtbooks/hickmanbrady/tdt_1965May
http://www.nxtbookMEDIA.com