Program: HathiTrust Digital Library
- Publisher: Karl Schwarzschild Observatorium
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 2263196
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
no.1-50 1961-69; no.1-50 1961-1970
|
committed to retain | 2011-02-01 | HTDL |
|