Longwall roof support technology in the eighties : a state-of-the-art report

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086 0 ‡aI 28.27:9066.
100 1 ‡aCurth, Ernest A.
245 1 0 ‡aLongwall roof support technology in the eighties : ‡ba state-of-the-art report / ‡cby Ernest A. Curth and Jeffrey M. Listak.
260 ‡aWashington, D.C. : ‡bU.S. Dept. of the Interior, Bureau of Mines, ‡c1986.
300 ‡aii, 43 p. : ‡bill. ; ‡c28 cm.
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490 0 ‡aInformation circular / United States Department of Interior, Bureau of Mines ; ‡v9066
504 ‡aBibliography: p. 35-37.
538 ‡aMode of access: Internet.
650 0 ‡aLongwall mining. ‡0http://id.loc.gov/authorities/subjects/sh85078310
650 0 ‡aGround control (Mining) ‡0http://id.loc.gov/authorities/subjects/sh85057450
700 1 ‡aListak, Jeffrey M.
899 ‡a39015078459123
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