Preprints on papers presented.
| Corporate Author: | |
|---|---|
| Format: | Conference Proceeding |
| Language: | English |
| Published: |
Monroeville, Pa. :
National Coal Association.
|
| Subjects: |
| Published: | 1st (1965)-7th (1977). |
|---|---|
| Physical Description: | 7 volumes : illustrations ; 24 cm. |