Fire clays of Pennsylvania /
| Main Author: | |
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| Corporate Author: | |
| Format: | Book |
| Language: | English |
| Published: |
Harrisburg, Pa. :
Dept. of Forests and Waters, Topographic and Geologic Survey,
1928.
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| Series: | Bulletin (Pennsylvania. Bureau of Topographic and Geologic Survey) ;
M10. |
| Subjects: |