@book{164885,
	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.  :}
}