Coastal shipping, feeder, and ferry services / United Nations. United Nations. Department of Economic and Social Affairs. United Nations Interregional Seminar on Coastal Shipping, Feeder, and Ferry Services, Os, Norway, 1969. Coastwise shipping. 387 UNC Includes bibliographical references. New York, United Nations, 1970. 1970. 1970 Text viii, 119 p. ; eng