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Supported by NSF Grant GB-30757 and BMS75-06287 and PHS Grant RR-00165 from NIH.
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Nadler, R.D. Sexual behavior of captive lowland gorillas. Arch Sex Behav 5, 487–502 (1976). https://doi.org/10.1007/BF01541338
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DOI: https://doi.org/10.1007/BF01541338