Optimal exploitation of solid mineral resources challenges and constraints / World Mining Congress - World Mining Congress, 1984 - 204p. Vol. 1; 204p.Vol. 2; 208p.Vol. 3; 223p.Vol. 4; 210p. Subjects--Topical Terms: Science Subjects--Index Terms: Research Universal Decimal Class. No.: 622.2(082.2) / M4.1