1. Clark, J. G. D. Proc. prehist. Soc. 21, 58–73 (1965).
2. Ammerman, A. J. & Cavalli-Sforza, L. L. The Neolithic Transition and the Genetics of Populations in Europe (Princeton University Press, Princeton, New Jersey, 1984).
3. Champion, T., Gamble, C., Shenan, S. & Whittle, A. Prehistoric Europe (Academic, London, 1984).
4. Barker, G. Prehistoric Farming in Europe (Cambridge University Press, Cambridge, 1985).
5. Barraclough, G. ed. The Times Atlas of World History (Hammond, Maplewood, New Jersey, 1979).