@book{167662,
	author = {Lara Rodríguez, Jonatan and Rodríguez Hilario, Efraín},
	title = {Actividad reproductiva postparto de vacas Holstein en Chapingo, México  /},
	publisher = {El autor,},
	year = {2002},
	address = {Chapingo, Méx.  :}
}