Program: HathiTrust Digital Library
- Publisher: Research Division, American Optical Co.
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 1480179
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
Materials | Archive Action | Date of Action | Program | Status/Note |
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v.1; v.1:4(1920); v.1 (1920); v.1-2 (1920-21); v.1 no.2-v.2 1920/21; v.2 (1921); v.3:2(1922); v.3 (1922); v.4 1923; v.5 1924; v.6-7 (1925-26); v.1(1920); v.3(1922)
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committed to retain | 2022-01-01 | HTDL |
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