%0 Journal Article %A Mercader, Julio %A Barton, Huw %A Gillespie, Jason %A Harris, Jack %A Kuhn, Steven %A Tyler, Robert %A Boesch, Christophe %+ Department of Primatology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society %T 4,300-Year-old chimpanzee sites and the origins of percussive stone technology : %G eng %U https://hdl.handle.net/11858/00-001M-0000-000F-FE41-7 %F EDOC: 319544 %R 10.1073/pnas.0607909104 %D 2007 %J Proceedings of the National Academy of Sciences of the United States of America %V 104 %N 9 %& 3043 %P 3043 - 3048