
Pennsylvania State College Bulletin, Circular 20
Earth and Mineral Sciences Experiment Station Circulars
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Work Title | Pennsylvania State College Bulletin, Circular 20 |
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Subtitle | Opportunities for Productive Work Through Mineral Industries Research |
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License | In Copyright (Rights Reserved) |
Work Type | Book |
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Publication Date | 1945 |
Deposited | September 17, 2014 |
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