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Start Over You searched for: Author Mines Bureau Remove constraint Author: Mines Bureau Catalog Issue Year Decade 1930 - 1939 Remove constraint Catalog Issue Year Decade: 1930 - 1939

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1492. Tin in 1931; by C. W. Merrill.

1493. Tin; by Charles White Merrill.

1495. Tungsten; by Frank L. Hess.

1496. Zinc; by E. W. Pehrson.