Media type: E-Article Title: Petermanns Geographische Mitteilungen [journal] Contributor: Demhardt, Imre Josef [Author] Published: 2015 Published in: The history of cartography [Elektronische Ressource] ; Vol. 6, Pt. 2: Cartography in the twentieth century ; (2015), Seite 1095-1099 Language: English Origination: Footnote: Engl Access State: Open Access