Hastenrath, Stefan, and Robert A. Caukwell. “Variations of Lewis Glacier, Mount Kenya, 1974-78”. ERDKUNDE 33, no. 4 (December 31, 1979): 292–297. Accessed October 7, 2024. https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1889.