J. Graf von Pfeil, "Morocco - Economic Possibilities and Prospects" - In: Oceanography - Collection of popular lectures to understand the national significance of the sea and marine life - 6th century (1912) 2nd volume Zur Zwischenablage hinzufügen BArch, N 2225/115 Akt(e) 1912 Teil vonFederal Archives (Archivtektonik) In: essays Pfeil, Joachim Graf von