Rasch, M. (1999) “H. Frater: Landforms of the Earth - cause, course, effect, animation. (Phenomena of the Earth). Berlin, Springer, 1998”., Geografisk Tidsskrift, 99. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/42369 (Set: 5 december 2025).