Guidebook to the geology about Pittsburgh.
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
Harrisburg,
l947 [cl939]
|
| Edition: | 2d ed. |
| Series: | Bulletin G ;
17. |
| Subjects: |
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
Harrisburg,
l947 [cl939]
|
| Edition: | 2d ed. |
| Series: | Bulletin G ;
17. |
| Subjects: |