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Start Over You searched for: Author Mines Bureau Remove constraint Author: Mines Bureau Publish Year Decade 1970 - 1979 Remove constraint Publish Year Decade: 1970 - 1979

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431. Sulfur in 1974.

433. Vernuculite in 1974.

434. Zirconium and hafnium in 1974.

435. Aluminum and bauxite in 1974.

436. Columbium and tantalum in 1974.

437. Copper in 1974.

438. Fluorspar in 1974.

439. Iron and steel in 1974.

440. Tin in 1974.