In a talk presented at the Annual Meeting of the American Anthropological Association on November 20, 1999, Jonathan Marks stated: "Humans, chimpanzees, and gorillas are within two percentage points of one another genetically." Jonathan Marks. “What It Really Means To Be 99% Chimpanzee”. 2013년 3월 27일에 원본 문서에서 보존된 문서. 2007년 9월 29일에 확인함.
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In a talk presented at the Annual Meeting of the American Anthropological Association on November 20, 1999, Jonathan Marks stated: "Humans, chimpanzees, and gorillas are within two percentage points of one another genetically." Jonathan Marks. “What It Really Means To Be 99% Chimpanzee”. 2013년 3월 27일에 원본 문서에서 보존된 문서. 2007년 9월 29일에 확인함.