(1977). Shipping Statistics Yearbook: Shipping Markets, Shipbuilding, Ports and Sea Canals / Institute of Shipping Economics and Logistics.
Chicago-referens (17:e uppl.)Shipping Statistics Yearbook: Shipping Markets, Shipbuilding, Ports and Sea Canals / Institute of Shipping Economics and Logistics. Bremen, 1977.
MLA-referens (8:e uppl.)Shipping Statistics Yearbook: Shipping Markets, Shipbuilding, Ports and Sea Canals / Institute of Shipping Economics and Logistics. 1977.
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