Troll, Carl, and Ulrich Schweinfurth. “Die Karte Des Khumbu-Himalaya (Ostnepal) 1 : 50 000”. ERDKUNDE 22, no. 1 (March 31, 1968): 29–33. Accessed December 4, 2024. https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1543.