Geology, mining, and methane content of the Freeport and Kittanning coalbeds in Indiana and surrounding counties, Pa. /
| Main Author: | |
|---|---|
| Corporate Author: | |
| Other Authors: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington] :
Dept. of the Interior, Bureau of Mines,
1979.
|
| Series: | Report of investigations (United States. Bureau of Mines) ;
8406. |
| Subjects: |