@book{217953,
	author = {Altieri, Miguel Angel and Nicholls, clara I.},
	title = {Agroecología : },
	publisher = {Programa de las Naciones Unidas para el Medio Ambiente : Universidad Autónoma Chapingo, },
	year = {2006},
	address = {México :},
	edition = {2a. ed.}
}