Program: HathiTrust Digital Library
- Publisher: [Print. and Pub. Office, National Academy of Sciences-National Research Council]
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 21390304
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
1922; 1926; 1940; 1964; 1966-1968; 1970
|
committed to retain | 2022-01-01 | HTDL |
|