Program: HathiTrust Digital Library
- Publisher: The Observatory
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 11733907
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
1956-58; 1959-61; 1962-1975
|
committed to retain | 2011-12-06 | HTDL |
|