Circular.
- Publisher: Pennsylvania State University
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 14139216
- Subject: Mineral industries Pennsylvania Periodicals.
- Subject code: T
- Publication history: no. 43-73; July 1, 1952/June 30, 1953-July 1965/June 1966.
Print Holdings
| Archiving Institution | Program | Holdings Description | Retention |
|---|---|---|---|
| HathiTrust (HATHI) | HTDL | no.9; no.10; no.20; no.21; no.26 1931-1946; no.30-37 (1948-51); no.37 1951; no.39 1952; no.42-55 (1951-56); no.56-63 (1959-62); no.64-67 (1962-64) | permanent |