GJAE. Ulrich Koester zum 70. Geburtstag. German Journal of Agricultural Economics, [S. l.], v. 58, n. 1, 2009. DOI: 10.52825/gjae.v58i1.1739. Disponível em: https://www.tib-op.org/ojs/index.php/gjae/article/view/1739. Acesso em: 22 nov. 2024.