Dogs and language, Savage-Rumbach

http://www.trivalleyherald.com/Stories/0,1413,86~10669~2206528,00.html

Linguistics: Sign language pictures of Koko

http://www.koko.org/world/signlanguage.html

Language and apes. It is claimed that there is no strong support for the idea that apes have language in a human sense.

http://www.mercurynews.com/mld/mercurynews/entertainment/books/8852904.htm?1c