Orangutan Sociality, Tool Use, and Human Culture Among Orangutans: Red Apes and the Rise of Human Culture. By Carel vanSchaik. Cambridge: Belknap Press of Harvard University Press, 2004.
Orangutan Sociality, Tool Use, and Human Culture Among Orangutans: Red Apes and the Rise of Human Culture. By Carel vanSchaik. Cambridge: Belknap Press of Harvard University Press, 2004.
