@book{167192,
	author = {International Symposium on Forage Cell Wall Structure and Digestibility (1991 : Madison, Wis.)},
	title = {Forage cell wall structure and digestibility  /},
	publisher = {American Society of Agronomy,},
	year = {1993},
	address = {Madison, Wis.  :},
	note = {Fotocopía c. 2}
}