The following list details pages, on-line, or books I read that have in some way contributed to this collection of information.  Sites and articles quoted directly are cited with their respective quotes.  All pages listed that, on their own, cite other materials or sources are indirectly implied here.

Books:

The Apes: 1986 ZooBooks, Wildlife Education, Ltd.
Chimpanzees and Bonobos:1990 ZooBooks, Wildlife Education, Ltd.
Orangutans: (no date) Zoobooks, Wildlife Education, Ltd.
Gorillas: 1993 ZooBooks, Wildlife Education, Ltd.
Gorilla: 1995 Eyewitness Books, Ian Redmond.
Gorillas and Chimpanzees: 1993 First Sight, David Chivers.
The Great Apes - Between Two Worlds: 1993 National Geographic Society, Michael Nichols.
Monkeys and Apes - A Portrait of the Animal World: 1994 Todtri Productions Limited, Paul Sterry
Apes: 1993 Ticknor & Fields, Tess Lemmon and John Butler

Sites:

Primate Info Net (PIN) -
http://www.primate.wisc.edu/pin/
Gorilla Haven -
http://www.gorilla-haven.org/ghneighbors.htm
Primate Taxonomy -
http://www.leeds.ac.uk/chb/lectures/anthl_08.html
Primate Classification - (site was since removed, no forwarding)
http://weber.u.washington.edu/~gorilla/mammalia/primates/primates.html
Unofficial Gorilla Homepage -
http://www.cs.ukc.ac.uk/people/staff/ms3/gorillas/
Chimp World -
http://www.geocities.com/EnchantedForest/Glade/3815/index.htm
Orangutan Foundation International -
http://www.orangutan.org/
International Primate Protection League -
http://www.ippl.org/
Gorilla Foundation -
http://www.gorilla.org/
Balikpapan Orangutan Society -
http://www.redcube.nl/bos/

CDs:

Apes: 1993 Corel Professional Photos CD-ROM