Dynamics of populations, movements and responses to climatic change in Africa : [Proceedings of the First Workshop of the Forum For African Archaeology and Cultural Heritage, Rome, April 9-21 1995 - University of Rome "La Sapienzia" and Istituto Italo-Africano] - Barich, Barbara E.; Gatto, M. C. (Maria Carmela) (Bonsignori, 1997)