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Start Over You searched for: Catalog Issue Year Decade 1930 - 1939 Remove constraint Catalog Issue Year Decade: 1930 - 1939 Sudoc Stem C 22.8/a Remove constraint Sudoc Stem: C 22.8/a

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196. Mica in 1928; by B. H. Stoddard.

198. Bauxite and aluminum in 1928.

200. Cement in 1928; by B. W. Bagley.