@book{8320,
	author = {Laing, John Archibald. and Morgan, W. J. Brinley.},
	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. de 1988}
}