@book{ 0-130188417, title = {Colloquium geographicum}, address = {Bergisch-Gladbach}, publisher = {Ferger}, address = {; Bonn}, publisher = {: Dümmler}, address = {; Sankt Augustin}, publisher = {: Asgard Verlag}, year = {1951}, issn = {0588-3253}, language = {German}, note = {Titelzusatz früher: Vorträge des Bonner Geographischen Kolloquiums zum Gedächtnis an Ferdinand von Richthofen}, url = {https://katalog.skd.museum/Record/0-130188417} }