Christensen, B. Brorson, Franz Firbas, Harry Godwin, Peter Ingwersen, Margaret S Bryan, G.F Mitchell, Johs. Iversen, Harald Krog, Svend Th. Andersen, Inger Brandt, Svend Jørgensen, Alfred Andersen, Valdemar M Mikkelsen, Knut Fægri, Hans Helbæk, and Rolf Nordhagen. “Studies in V Egetational History in Honour of Knud Jessen”. Danmarks Geologiske Undersøgelse II. Række 80 (November 29, 1954): 1–308. Accessed July 3, 2024. https://geusjournals.org/index.php/raekke2/article/view/6870.