@book{166417,
	author = {Laing, John Archibald},
	title = {Fertilidad e infertilidad en la práctica veterinaria  /},
	publisher = {Interamericana,},
	year = {1991},
	address = {México, D. F.  :},
	note = {Trad. De : Fertility and infertility in veterinary practice, 4 ed. 1988}
}