Program: HathiTrust Digital Library
- Publisher: U.S. Dept. of the Interior, Geological Survey
- Print ISSN: 0735-3820
- Electronic ISSN: 0735-3820
- OCLC Number: 3886698
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
1968
|
committed to retain | 2018-03-01 | HTDL |
|