@book{95649,
	author = {González Ortíz, Benigna.},
	title = {Factores ambientales que afectan el comportamiento reproductivo de vacas Holstein},
	publisher = {El autor,},
	year = {2008},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/107277.pdf}
}