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Biological Sciences - Anthropology:
R. Adriana Hernandez-Aguilar,
Jim Moore,
and Travis Rayne Pickering
From the Cover: Savanna chimpanzees use tools to harvest the underground storag...PNAS 2007104:19210-19213; published ahead of print November 21, 2007,doi:10.1073/pnas.0707929104
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