@book{167752,
	author = {Leff, Enrique. and Universidad Nacional Autónoma de México.},
	title = {Saber ambiental},
	publisher = {UNAM, Centro de Investigaciones Interdisciplinarias en Ciencias y Humanidades},
	year = {1998.},
	series = {Ambiente y democracia},
	address = {México, D.F.}
}