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Seeverkehr und Schiffahrtswirtschaft
Svendsen, Arnljot Strømme, (1958)
Merchant marine policy : proceedings of the symposium of the Fifteenth Ocean Shipping Management Institute of the American University's School of Business Administration
Reese, Howard C., (1963)
Shipping statistics yearbook : facts and figures about shipping, shipbuilding, seaports and seaborne trade
(1977)