BERG, Ernst. In memoriam Günther Steffen. German Journal of Agricultural Economics, [S. l.], v. 64, n. 4, 2015. DOI: 10.52825/gjae.v64i4.2008. Disponível em: https://www.tib-op.org/ojs/index.php/gjae/article/view/2008. Acesso em: 22 nov. 2024.