Petrography of coal in the Houtzdale quadrangle, Clearfield County, Pennsylvania,
| Main Author: | |
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| Corporate Author: | |
| Format: | Book |
| Language: | English |
| Published: |
Harrisburg
[Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geologic Survey]
1967.
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| Series: | Bulletin (Pennsylvania. Bureau of Topographic and Geologic Survey) ;
M55. |
| Subjects: |