Program: HathiTrust Digital Library
- Publisher: Commonwealth of Pennsylvania, Bureau of Topographic and Geologic Survey
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 7361516
- Validation: None
- Retention: permanent
- Institution: HathiTrust
- Facility:
- OCLC Symbol: HATHI
- Holdings Format: Print
| Materials | Archive Action | Date of Action | Program | Status/Note |
|---|---|---|---|---|
|
1973; 1977; 1978/1979; 1980-1981
|
committed to retain | 2014-11-11 | HTDL |
|