Some problems related to the preparation of Illinois coals.
| Main Author: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
Urbana,
[publisher not identified] ;
1939.
|
| Series: | Circular (Illinois State Geological Survey) ;
44. |
| Subjects: |
| Item Description: | "Reprinted from Transactions of the A. S. M. E. for January, 1939." |
|---|---|
| Physical Description: | 4 pages : maps. |