Hansen., K. (1956) “W. H. Emmons, G. A.Thiel, C. R. Stauffer and I. S. Allison: Geology. Principles and processes. McGraw-Hill Book Comp., New York, Toronto, London. Fourth Edition. 1955. 638 sider. 519 fig., 23x15 cm”., Geografisk Tidsskrift, 55. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/46279 (Set: 7 december 2025).