Use of a large-diameter auger in mining anthracite beds
| Main Author: | Schimmel, J. T. |
|---|---|
| Other Authors: | Tavenner, W. H., Markle, Donald, 1892-1977., United States. Bureau of Mines., Raven Run Coal Co. |
| Format: | Book |
| Language: | English |
| Published: |
Washington :
U.S. Dept. of the Interior, Bureau of Mines,
1962.
|
| Physical Description: |
ii, 24 pages : illustrations ; 27 cm. |
| Series: |
Report of investigations (United States. Bureau of Mines) ;
6135. |
| Subjects: |