Kingo Jacobsen., N. “Margaret Bishop: Subsurface Mapping. John Wiley & Sons, Inc. New York, London 1960. 198 Sider, Ill. 15x23,5 Cm. $ 5,75”. Geografisk Tidsskrift - Danish Journal of Geography 61 (January 1, 1962). Accessed December 5, 2025. https://tidsskrift.dk/geografisktidsskrift/article/view/46773.