@book{2831,
	author = {Ramírez Abarca, Aymer. and Quintanar Reséndiz, Abel.},
	title = {Comportamiento productivo y reproductivo de novillonas en pastoreo, segunda fase},
	publisher = {El autor,},
	year = {1991},
	address = {Chapingo, Méx. :},
	note = {D47-123}
}