@book{74444,
	author = {Martínez Correa, Mario.},
	title = {Digestibilidad in situ de ballico perenne (Lolium perenne L. y trébol blanco (Trifolium repens L.)},
	publisher = {El autor,},
	year = {1997.},
	address = {Chapingo, Méx. :}
}