Program: HathiTrust Digital Library
- Publisher: The Observatory
- Print ISSN: 0309-0108
- Electronic ISSN:
- OCLC Number: 4684604
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
1891/92-1892/93,1894/95-1895/96,1898/99; 1959-72; 1972-80
|
committed to retain | 2010-02-19 | HTDL |
|