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BEAUVILAIN, Alain. The contexts of discovery of Australopithecus bahrelghazali (Abel) and of Sahelanthropus tchadensis (Toumaï): unearthed, embedded in sandstone, or surface collected?. S. Afr. j. sci. [online]. 2008, vol.104, n.5-6, pp.165-168.
ISSN 1996-7489.
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