@book{2839,
	author = {International Symposium on Man's Role in Changing the Face of the Earth, and Thomas, William Leroy,},
	title = {Man's role in changing the face of the earth.},
	publisher = {Published for the Wenner-Gren Foundation for Anthropological Research and the National Science Foundation by the University of Chicago Press},
	year = {1956.},
	address = {Chicago,}
}