Arch canopy design procedure for rehabilitation of high-roof-fall areas

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100 1 ‡aAllwes, Richard A.
245 1 0 ‡aArch canopy design procedure for rehabilitation of high-roof-fall areas / ‡cby Richard A. Allwes, C.P. Mangelsdorf, and Deno M. Pappas.
260 ‡a[Pittsburgh, Pa.] : ‡bU.S. Dept. of the Interior, Bureau of Mines, ‡c[1987]
300 ‡aiii, 51 p. : ‡bill. ; ‡c28 cm.
336 ‡atext ‡btxt ‡2rdacontent
337 ‡acomputer ‡bc ‡2rdamedia
338 ‡aonline resource ‡bcr ‡2rdacarrier
490 0 ‡aReport of investigations / United States Department of the Interior, Bureau of Mines ; ‡v9075
504 ‡aBibliography: p. 49.
538 ‡aMode of access: Internet.
650 0 ‡aMine roof control. ‡0http://id.loc.gov/authorities/subjects/sh85085531
700 1 ‡aPappas, Deno M.
700 1 ‡aMangelsdorf, C. P.
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