@book{90594,
	author = {Ruíz Figueroa, José Feliciano},
	title = {Agricultura bio-intensiva sostenible en el minifundio mexicano:},
	publisher = {UACH. Departamento de Suelos,},
	year = {2000},
	address = {Chapingo, Méx. :},
	edition = {2 ed.}
}