BOEHN, D.; HAMANN, B. APPROACHES TO SUSTAINABILITY EXAMPLES FROM GEOGRAPHY TEXTBOOK ANALYSIS IN GERMANY. European Journal of Geography, [S. l.], v. 2, n. 1, 2021. Disponível em: https://www.eurogeojournal.eu/index.php/egj/article/view/34. Acesso em: 29 sep. 2023.