A geological hand atlas of the sixty-seven counties of Pennsylvania, embodying the results of the field work of the survey, from 1874 to 1884.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Harrisburg,
Board of Commissioners for the Second Geological Survey,
1885.
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| Series: | Report of progress (Geological Survey of Pennsylvania) ;
X. |
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