Cutter roof failure : six case studies in the Northern Appalachian Coal Basin /
Main Author: | |
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Corporate Author: | |
Format: | Government Document Book |
Language: | English |
Published: |
[Washington, D.C.] (2401 E St., N.W., Washington 20241) :
U.S. Dept. of the Interior, Bureau of Mines,
[1990]
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Series: | Information circular (United States. Bureau of Mines)
9266 |
Subjects: |