Catalog Record: Coal mine roof and rib control | HathiTrust Digital Library

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Coal mine roof and rib control.

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Language(s): English
Published: [Washington, D.C.?] : U.S. Dept. of Labor, Mine Safety and Health Administration, National Mine Health and Safety Academy, 1991.
Subjects: Mine roof control.
Mine safety > Mine safety / United States.
Coal mines and mining > Coal mines and mining / United States > Coal mines and mining / United States / Safety measures.
Note: "Reprinted 1991"--Cover.
Physical Description: 49 p. : ill. ; 18 cm.
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