Title: 100 Jahre geologischer Staatsdienst in Nordrhein-Westfalen, 1873-1973
Subjects: North Rhine-Westphalia. Geologisches Landesamt, History, North Rhine-Westphalia, Geology, North Rhine-Westphalia (Germany) Geologisches Landesamt, North Rhine-Westphalia (Germany)
Places: Germany, North Rhine-Westphalia