The Pittsburgh coal bed ; its early history and development /
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
New York :
American Institute of Mining and Metallurgical Engineers,
1938.
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| Subjects: |
| Physical Description: | 55 pages : folded maps (in pocket) folded tables (in pocket) diagram ; 24 cm. |
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| Bibliography: | "Partial list of works consulted": pages 48-55. |