| Reference | {Production:: BAKER, D. R., AND J. E. NELSON. CONSTRUCTION AND OPERATION}{Production:: OF A ZERO DISCHARGE ZINC CONCENTRATOR. MINING CONGRESS}{Production:: JOURNAL, APRIL 1979, P. 2326.}{Production:: DAYTON, STANLEY H., ED. REVOLUTIONARY THICKENER DESIGN}{Production:: TACKLES HEAVY FLOW OF ZINC MINE TAILINGS. ENGINEERING}{Production:: AND MINING JOURNAL, APRIL 1978, PP. 78-79.}{Reserve-Resource:: GULF AND WESTERN INDUSTRIES, INC. FORM 10-K. JULY 1979,}{Reserve-Resource:: P. 32, JULY 1978, P. 27, JULY 1977, P. 7.} |