Holm Jakobsen, Bjarne. “International Symposium on Red Soils, 1983, Nanjing: Proceedings. Ed. By Institute of Soil Science, Academia Sinica”. Geografisk Tidsskrift - Danish Journal of Geography 88 (January 1, 1988). Accessed December 6, 2025. https://tidsskrift.dk/geografisktidsskrift/article/view/44550.