Stanford, Craig B. The Predatory Behavior and Ecology of Wild Chimpanzees university of Southern California. 2002(?) ChimpCARE.org Human Timeline (Interactive) – Smithsonian, National Museum of Natural History (August 2016).
Stanford, Craig B. The Predatory Behavior and Ecology of Wild Chimpanzees university of Southern California. 2002(?) ChimpCAREorg Human Timeline (Interactive) – Smithsonian, National Museum of Natural History (August 2016).