Sources of information and unusual services;
- Publisher: Informational Directory Co.
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 269257290
- Subject: Information services United States.
- Subject code: A
- Publication history:
Print Holdings
| Archiving Institution | Program | Holdings Description | Retention |
|---|---|---|---|
| HathiTrust (HATHI) | HTDL | 1956-57; 1961; 1964 | permanent |