ONLINE FORMAT
| Text | 1 |
LOCATION
| Pennsylvania | |
| West Virginia | 1 |
SUBJECT
| Gas reservoirs--Appalachian Region--Maps | |
| Gas reservoirs--Appalachian Region--Maps | |
| Gas fields--Appalachian Region--Maps | 1 |
| Geology, Structural--Appalachian Region--Maps | 1 |
