Mineral resources of the sea / Wang, Feng-hui, 1924- United Nations. Department of Economic and Social Affairs. Resources and Transport Division. Marine mineral resources. JX1977 .A2 ST/ECA/125 333.8 UNM At head of title: Department of Economic and Social Affairs. "United Nations publication. Sales no.: E.70.II.B.4." Bibliography: p. 47. New York : United Nations, 1970. 1970. 1970 Text vi, 49 p. eng