20с

1936г

*"1

UNITED STATES DEPARTMENT OF THE INTERIOR

Harold L. Ickes, Secretary

BUREAU OF MINES

John W. Finch, Director

ORE CONCENTRATION

(detailed statistics) METALLURGICAL RESULTS AND FLOTATION REAGENTS

RY T. H. MILLER AND R. L. KIDD

Statistical Appendix to

MINERALS YEARBOOK 1935

UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1936

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