@book{1511,
	author = {Hafez, E. S. E.},
	title = {Reproducción e inseminacióm artificial en animales},
	publisher = {Interamericana,},
	year = {1989},
	address = {México, D. F. :},
	note = {Trad. de : Reproduction in farm animals. 5 ed. de 1987}
}