@book{894,
	author = {Cook, Sherburne Friend,  and Borah, Woodrow Wilson, },
	title = {Essays in population history :},
	publisher = {University of California Press, },
	year = {c1974},
	address = {Berkeley, CA :},
	note = {La biblioteca solo tiene el vol. 2},
	url = {https://www.cicy.mx/sitios/sib/doctoelectronico/905.pdf}
}