Frederiksen, Peter. “Lithology and Stratigraphy of Loess and Paleosols: Proceedings of the Symposium Organized by INQUA Commision on Loess and Paleopedology: 11th INQUA Congress, Moscow. Ed. By Marlon Pécsi”. Geografisk Tidsskrift 85 (januar 1, 1985). Set december 23, 2025. https://tidsskrift.dk/geografisktidsskrift/article/view/44188.