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Resume of work of the nonmetals division :calendar year 1936

Annual report of the nonmetals division, fiscal year 1937

Flotation and agglomerate concentration of nonmetallic minerals

Annual report of the nonmetals division :fiscal year 1938

Annual report of the nonmetals division, fiscal year 1939

Published Year

• 1930-1939 (5) *

Subject

• Nonmetallic minerals (5) *
• Nonmetals (4)
• Flotation (1)

Author

• Ralston, Oliver C. (5)
• Stern, A. George. (1)

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