The art of trade : 4 centuries of maritime imagination = Art inspired by the sea : 4 centuries of maritime artOpinion with respect to the proposed downsizing of maritime traffic stations : adopted February 24, 1988 : delivered to the Minister of Transportation and Public Works dated March 4, 1988Annual report / National Ports CouncilPort of Amsterdam : facts and picturesComparative statistics of maritime cargo traffic of the seven main continental North Sea portsWorld facts and figures : change mirrored in statistics