Hellen, J. Anthony. “A Note on Development of the Kafue Flats in Northern Rhodesia With Particular Reference to Polder Methods in Agriculture”. ERDKUNDE 18, no. 2 (June 30, 1964): 149–156. Accessed April 4, 2025. https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1441.