Babiker, Abdel Bagi A.G. “Rural Household Energy in the Nuba Mountains - Republic of the Sudan: Trends of Use and Impacts”. ERDKUNDE 37, no. 2 (June 30, 1983): 109–117. Accessed December 5, 2024. https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/2003.