@book{164140,
	author = {Ramírez Abarca, Aymer and I. Quintanar Resendiz, Abel II. Ramírez Sánchez, Roberto J.},
	title = {Comportamiento productivo y reproductivo de novillonas en pastoreo, segunda fase  /},
	publisher = {Los autores,},
	year = {1991},
	address = {Chapingo, Méx.  :}
}