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Start Over You searched for: Publish Year Decade 1920 - 1929 Remove constraint Publish Year Decade: 1920 - 1929 Catalog Issue Year Decade 1920 - 1929 Remove constraint Catalog Issue Year Decade: 1920 - 1929 Sudoc Stem C 13.17 Remove constraint Sudoc Stem: C 13.17

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1. Glass. Soda-lime glass.

2. Phosphates. Tennessee phosphate rock.

3. Steel. Bessemer steel, 0.6% carbon.

4. Feldspar. Feldspar.

6. Cast-iron. Cast iron.

7. Bauxite. Bauxite.