@book{93364,
	author = {Ayala Garay, Alma Velia},
	title = {Competitividad del frijol en México, en un contexto de apertura comercial /},
	publisher = {El autor,},
	year = {2006.},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/104923.pdf}
}