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Hans Obenaus
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Ships and shipping of tomorrow
Rolf Schonknecht, Manfred Schelzel, Hans Obenaus · Cornell Maritime Press
240 sayfa · 1983
Naval architecture / Shipping / Merchant ships
Geographie des Seeverkehrs
Hans Obenaus · Transpress, Verlag für Verkehrswesen, VEB
318 sayfa · 1979
Commercial geography / Merchant marine / Shipping