@book{50854,
	author = {Sauvy, Alfred},
	title = {Historia del control de nacimientos},
	publisher = {Ediciones Península},
	year = {1972.},
	series = {Historia , Ciencia, Sociedad, 77},
	address = {Barcelona},
	edition = {1. ed.},
	note = {Translation of La prévention des naissances dans la famille.}
}