1. Expériences de taille d'outils pr6historiques dans des os d'éléphant;Biberson;Quaternaria,1965
2. Bones: Ancient Men and Modern Myths;Binford,1981
3. Acheulian occupation sites at Torralba and Ambrona, Spain: their geology;Butzer;Science,1965
4. Environment, culture, and human evolution;Butzer;American Scientist,1977
5. A Spanish camp of Stone Age elephant hunters;Cole;New Scientist,1962