Author: | Jenkins, F. M. |
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Additional Authors: | Cullen, E. T. |
Year: | 1990 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.27:9253 |
Series: | Information circular / Bureau of Mines ; |
Report Number: | 9253 |
Subject: | Longwall mining--United States |
Link: | https://hdl.handle.net/2027/mdp.39015078458299 |