Reports of Research on Pennsylvania’s Coal Resources
These reports were completed by the Mineral Industries Experiment Station from 1957 to 1972.
| IPR-1 | April 15, 1957 - August 1957 |
| IPR-3 | March - August 1958 |
| IPR-19 | January - June 1966 |
| IPR-20 | July - December 1966 |
| IPR-27 | 1970 |
| IPR-28 | 1971 |
| IPR-30A | July - December 1971 |
| IPR-31B | January - June 1972 |
| No. 1 | April 15, 1957 - August 1957 |
| No. 2 | September 1957 - February 1958 |
| No. 4 | September 1958 - February 1959 |
| No. 5 | March - September 1, 1959 |
| No. 7 | March - August 1960 |
| No. 8 | September 1960 - February 1961 |