@book{164320,
	author = {Warwick, Everett James},
	title = {Cría y mejoramiento del ganado  /},
	publisher = {Interamericana,},
	year = {1980},
	address = {México, D. F.  :},
	note = {Trad. de: Breeding and improving of farm animals, 7 ed. de 1979}
}