@book{93194,
	author = {Crespo Lira, Heladio},
	title = {Producción y utilización de forraje de maiz (Zea mays) y sorgo (Sorghum bicolor + S. sudanense) /},
	publisher = {El autor,},
	year = {2006.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/104750.pdf}
}