TROLL, C.; SCHWEINFURTH, U. Die Karte des Khumbu-Himalaya (Ostnepal) 1 : 50 000. ERDKUNDE, [S. l.], v. 22, n. 1, p. 29–33, 1968. DOI: 10.3112/erdkunde.1968.01.04. Disponível em: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1543. Acesso em: 7 oct. 2024.