Pittsburgh quadrangle : geology and mineral resources /
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
Harrisburg :
Department of Internal Affairs, Topographic and Geological Surver,
[1929]
|
| Series: | Pennsylvania Geological Survey,
Topographic and geologic atlas of Pennsylvania ; no. 27 |
| Subjects: |