333.8
U58P
               Proceedings of the ninth session of the committee on natural resources incorporating the triennial review of mineral development activities in the ESCAP region, 1979-1981 - New York : United Nations, 1983.
               vii, 387p. - Mineral resources development series; no. 50 .
116637
                Subjects: Natural resources-Study and teaching; Natural resources surveys; Mines and mineral resources.