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Start Over You searched for: Author Mines Bureau Remove constraint Author: Mines Bureau Publish Year Decade 1960 - 1969 Remove constraint Publish Year Decade: 1960 - 1969

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1921. Chromium; by R. W. Holliday.

1922. Clays; by James D. Cooper.

1924. Cobalt; by Glen C. Ware.

1927. Copper; by F. L. Wideman.

1929. Diatomite; by Benjamin Petkof.