30 x 60 minute series (topographic) [United States] /
- Author(s):
- Geological Survey (U.S.)
- Publisher:
- The Survey,
- Year:
- 197-
- Held by:
- MIT
- More details at
- https://mit.primo.exlibrisgroup.com/discovery/fulldisplay?vid=01MIT_INST:MIT&docid=alma990008351370106761