@article {45361, title = {Carl Troll {\textendash} Naturforscher und Geograph}, journal = {Erdkunde}, volume = {30}, year = {1976}, pages = {1-9}, url = {https://www.erdkunde.uni-bonn.de/archive/1976/carl-troll-naturforscher-und-geograph/}, author = {Wilhelm Lauer} }