Program: HathiTrust Digital Library
- Publisher: Iowa Dept. of Natural Resources, Energy and Geological Resources Division, Geological Survey Bureau
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 26377321
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
1 1976; 2 1978; ser.1-4 (1976-1979); 5 1987; 6 1988; no.8 1988; no.10 1990; no.11 1992; no.21 1996; no.22 1996; v.17-18 1996; v.19-21 1996
|
committed to retain | 2018-01-25 | HTDL |
|