TRÖGER, S. Sustainability in the context of natural and social environments.: An actor-oriented interpretation from South-West Tanzania. ERDKUNDE, [S. l.], v. 56, n. 2, p. 170–183, 2002. DOI: 10.3112/erdkunde.2002.02.05. Disponível em: https://www.erdkunde.uni-bonn.de/article/view/2481. Acesso em: 30 apr. 2025.