Program: HathiTrust Digital Library
- Publisher: Colorado Geological Survey, Dept. of Natural Resources
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 20727659
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
1875/1975-1975/1980; 1981/1982; 1983; 1984/1989
|
committed to retain | 2018-04-06 | HTDL |
|