Clark, J. Desmond (1960). "Human Ecology During Pleistocene and Later Times in Africa South of the Sahara". Current Anthropology. 1 (4): 317. doi:10.1086/200115. JSTOR2739766. S2CID145339570.
Clark, J. Desmond (1960). "Human Ecology During Pleistocene and Later Times in Africa South of the Sahara". Current Anthropology. 1 (4): 317. doi:10.1086/200115. JSTOR2739766. S2CID145339570.
Clark, J. Desmond (1960). "Human Ecology During Pleistocene and Later Times in Africa South of the Sahara". Current Anthropology. 1 (4): 317. doi:10.1086/200115. JSTOR2739766. S2CID145339570.