@book{91095,
	author = {Cruz Salas, Carla Norma.},
	title = {Sincronización de estros en vacas holstein con problemas reproductivos /},
	publisher = {El autor,},
	year = {2005.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/102630.pdf}
}