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Citations
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Boesch C, & Boesch H. (1990). Tool use and tool making in wild chimpanzees. Folia Primatol., 54, 86.
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Boesch C, & Boesch H. (1984). Possible causes of sex differences in the use of natural hammers by wild chimpanzees. J. Hum. Evol., 13, 415.
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Boesch C, & Boesch H. (1984). Mental maps in wild chimpanzees: an analysis of hammer transports for nut cracking. Primates, 25, 160.
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