@book{43776,
	author = {Vogtmann, H.},
	title = {Agricultura ecologica: teoria e pratica},
	publisher = {Mercado Aberto, },
	year = {1987. },
	address = {Porto Alegre, RS (Brasil): },
	note = {33 tables; 47 illus.; Bibliography p. 155-164 (180 ref.)}
}