@book{32673,
	author = {González Posso, Andrés},
	title = {Agroecología: La Agricultura Sostenible /},
	publisher = {El Colegio Verde de Villa de Leyva,},
	year = {1992.},
	series = {Ecoguías No.5},
	address = {Santafe de Bogotá :}
}