Verstappen, H. T. (1977). An atlas illustrating the use of aerial photographs in geomorphological mapping. International Institute for Aerial Survey and Earth Sciences.
Chicago-Zitierstil (17. Ausg.)Verstappen, H. Theodoor. An Atlas Illustrating the Use of Aerial Photographs in Geomorphological Mapping. Enschede, Netherlands: International Institute for Aerial Survey and Earth Sciences, 1977.
MLA-Zitierstil (8. Ausg.)Verstappen, H. Theodoor. An Atlas Illustrating the Use of Aerial Photographs in Geomorphological Mapping. International Institute for Aerial Survey and Earth Sciences, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.