| References: |
- 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.
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