KÖHNE, Manfred. Ökonomische Aspekte des ökologischen Landbaus. German Journal of Agricultural Economics, [S. l.], v. 50, n. 7, 2001. DOI: 10.52825/gjae.v50i7.1483. Disponível em: https://www.tib-op.org/ojs/index.php/gjae/article/view/1483. Acesso em: 23 nov. 2024.