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Procedures used for sampling fracture orientations in an underground coal mine
A Bureau of Mines direct-reading azimuth protractor
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Published Year
1970-1979 (2)
Subject
Rock mechanics--Research (2) *
Coal mines and mining--Research (1)
Fracture mechanics--Research (1)
Protractors (1)
Author
Bolstad, D. D. (2)
Mahtab, M. A. (2) *
Alldredge, J. R. (1)
