@book{5508,
	author = {Leyva Hernández, Rodimiro.},
	title = {Evaluación agrotécnica del arado integral de vertederas reversibles John Deere 3835},
	publisher = {El Autor,},
	year = {1992},
	address = {Chapingo, Méx. :},
	note = {58-43}
}