Geology of the Portal quadrangle, North Dakota
| Main Author: | Townsend, Roland C. |
|---|---|
| Format: | Map |
| Language: | English |
| Published: |
Washington, D.C. :
U.S. Geological Survey,
1954.
|
| Physical Description: |
1 map : color ; 44 x 29 cm on sheet 76 x 128 cm, folded to 76 x 64 cm. |
| Series: |
Geologic quadrangle map ;
GQ-47. |
| Subjects: |