KÖCK, Helmuth. Dilemmas of (Geographical) Environmental Education (Part II). Journal of Geography Education, [S. l.], v. 31, n. 2, p. 61–79, 2003. DOI: 10.60511/zgd.v31i2.266. Disponível em: https://zgd-journal.de/index.php/zgd/article/view/266. Acesso em: 2 apr. 2026.