The blue book contractors register.
- Publisher: Contractors Register
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 17537678
- Subject: Contractors Pennsylvania Directories.
- Subject code: T
- Publication history: 1988.
Print Holdings
| Archiving Institution | Program | Holdings Description | Retention |
|---|---|---|---|
| HathiTrust (HATHI) | HTDL | 1988 | permanent |