Circular.
- Publisher:
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 12000321
- Subject: Mineral industries Pennsylvania.
- Subject code: T
- Publication history: Began in 1929.
Print Holdings
| Archiving Institution | Program | Holdings Description | Retention |
|---|---|---|---|
| HathiTrust (HATHI) | HTDL | no.1-16 1929-1944; no.17 1944; no.26 1946; no.21-25 and 27-35 1945-1950; no.36 1950; no.37-40 and 42 1951-1955; no.43-48 1955-1957; no.49-51 1957-1958; no.52-56 1958-1959; no.57-60 1959-1961; no.61-63 1961-1962; no.64-67 1963-1964; no.68-70 1961-1965; no.71-72 1966 | permanent |