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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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461. Clays in 1973.

462. Cement in 1973.

463. Zirconium and hafnium in 1973.

468. Stone in 1973.

470. Slag-iron and steel 1973.