@book{209296,
	author = {Cipolla, Carlo M. and Beltrán , Jordi},
	title = {Historia económica de la población mundial},
	publisher = {Crítica},
	year = {2000.},
	series = {Biblioteca de bolsillo},
	address = {Barcelona},
	note = {Translation of: The economic history of world population , c 1978.}
}