Program: HathiTrust Digital Library
- Publisher: Colorado Geological Survey, Dept. of Natural Resources, State of Colorado
- Print ISSN: 0360-7674
- Electronic ISSN:
- OCLC Number: 2244650
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
1972:no.1; no.9 Text 1975; no.11 1979; 1979:no.11-12
|
committed to retain | 2018-01-25 | HTDL |
|