Biblio
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] Filters: Author is Wilhelm Lauer and First Letter Of Title is C [Clear All Filters]
, “Carl Troll – Naturforscher Und Geograph”, Erdkunde, Erdkunde, 30 (1976), 1-9 <https://www.erdkunde.uni-bonn.de/archive/1976/carl-troll-naturforscher-und-geograph/>