World mineral statistics 1974 - 78 production, exports, imports compiled by C.D.G. Black... (et al.) - 3rd. ed. - London H. M. S. O. 1980 - 250p. : ill. ; 30cm At head of title: Institute of Geological Sciences. Natural environment Research Council ISBN: 0118841637 Subjects--Topical Terms: Mineral industries--Statistics