Geology and mineral resources of the Bellefonte quadrangle, Pennsylvania
| Main Author: | Butts, Charles, 1863-1946. |
|---|---|
| Format: | Books Print Book |
| Language: | English |
| Published: |
Washington :
U.S. Govt. Print. Off.,
1936.
|
| Series: |
U.S. Geological Survey bulletin ;
855. U.S. Geological Survey bulletin ; 855. |
| Subjects: |