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Start Over You searched for: Catalog Issue Year Decade 1960 - 1969 Remove constraint Catalog Issue Year Decade: 1960 - 1969 Sudoc Stem I 28.37/a Remove constraint Sudoc Stem: I 28.37/a

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11. Cadmium; [by Harold J. Schroeder].

13. Carbon black; [by W. B. Harper].

14. Chromium; [by John L. Morning].

15. Cobalt; [by Horace T. Reno].

18. Ferroalloys; [by John L. Morning].

20. Gem stones, [by Benjamin Petkof].