Planning the external sector : techniques, problems and policies; report on the first interregional seminar on development planning; Ankara, Turkey 6-17 September 1965. - New York : UN , 1967 - iv, 265p. ; 30 cm. Includes bibliographical references and index. Subjects--Topical Terms: Economic developmentInternational economics Dewey Class. No.: 338.89 / UN-20