Program: HathiTrust Digital Library
- Publisher: The Observatory
- Print ISSN: 0457-4281
- Electronic ISSN:
- OCLC Number: 173829741
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
1949-1971; 1951-71
|
committed to retain | 2011-07-27 | HTDL |
|