H. Greve, Mogens, Markku Yli-Halla, Aage A. Nyborg, and Ingrid Öborn. “Appraisal of World Reference Base for Soil Resources - from a Nordic Point of View”. Geografisk Tidsskrift - Danish Journal of Geography 100 (January 1, 2000). Accessed August 16, 2024. https://tidsskrift.dk/geografisktidsskrift/article/view/42385.