Program: HathiTrust Digital Library
- Publisher: Instruments Publishing Company
- Print ISSN: 0096-2066
- Electronic ISSN:
- OCLC Number: 7055621
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
v.22 AUG/DEC 1949; v.22 JAN/JUL 1949; v.23 AUG/DEC 1950; v.23 JAN/JUL 1950
|
committed to retain | 2022-10-20 | HTDL |
|