@book{608,
	author = {Berlijn, Johan D.},
	title = {Porcinos},
	publisher = {Trillas,},
	year = {1989},
	series = {Manuales para educación agropecuaria. Producción animal},
	address = {México, D. F. :},
	edition = {2 ed.},
	note = {37-82}
}