Modified longwall mining with a German coal planer (plow) in the Pocohontas No. 4 coal bed, Helen, W. Va
| Main Author: | Haley, Wilbur A. |
|---|---|
| Other Authors: | Dowd, James J., Turnbull, Louis A. |
| Format: | Book |
| Language: | English |
| Published: |
[Washington, D.C.] :
U.S. Dept. of the Interior, Bureau of Mines,
[1952]
|
| Physical Description: |
ii, 13 pages, 10 unnumbered leaves of plates : illustrations ; 27 cm. |
| Series: |
Report of investigations (United States. Bureau of Mines) ;
4922. |
| Subjects: |
CMU Storage Gov Pub
| Location | Call Number: | Status |
|---|---|---|
| CMU Storage Gov Pub | I 28.23:4922 | Available |