U.S. Geological Survey records (RG 57) on microfilm
Wednesday, September 17, 2025
| Creator | U.S. Geological Survey |
| Extent | 29 rolls |
| Letters sent by the USGS. (M152, 29 rolls) Indexed. |
| Language | English |
| Collection Identifier | I031 |
| Physical Location | This collection is located at the Center of Southwest Studies on the campus of Fort Lewis College (1000 Rim Dr. Durango, CO). |