อ้างอิง ของ เครื่องมือ

  1. Sam Lilley, Men, Machines and History: The Story of Tools and Machines in Relation to Social Progress, 1948 Cobbett Press.
  2. Whiten, A., J. Goodall, W.C. McGrew, T. Nishida, V. Reynolds, Y. Sugiyama, C.E.G. Tutin, R.W. Wrangham, and C. Boesch. 1999. Cultures in Chimpanzees. Nature 399:682—85. Panger, M.A., A.S. Brooks, B.G. Richmond, and B. Wood. 2002. Older than the Oldowan? Rethinking the emergence of hominin tool use. Evolutionary Anthropology: Issues, News, and Reviews 11:235–45.

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