LEADER 01333nam  2200349Ka 450 
001 9910696890103321
005 20080722085251.0
035   $a(CKB)5470000002381977
035   $a(OCoLC)234380231
035   $a(EXLCZ)995470000002381977
100   $a20080722d1973      ua             0
101 0 $aeng
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aGeologic factors causing roof instability and methane emission problems$b[electronic resource] $ethe Lower Kittaning coalbed, Cambria County, Pa. /$fby C.M. McCulloch and Maurice Deul
210  1$a[Washington, D.C.?] :$cU.S. Dept. of the Interior, Bureau of Mines,$d[1973]
215   $aii, 25 pages $cdigital, PDF file
225 1 $aReport of investigations ;$v7769
300   $aTitle from title screen (viewed on July 18, 2008).
517   $aGeologic factors causing roof instability and methane emission problems 
606   $aMine roof control
615  0$aMine roof control.
700   $aMcCulloch$b C. M$g(Charles M.)$01389497
701   $aDeul$b Maurice$01400549
712 02$aUnited States.$bBureau of Mines.
801  0$bGPO
801  1$bGPO
906   $aBOOK
912   $a9910696890103321
996   $aGeologic factors causing roof instability and methane emission problems$93481157
997   $aUNINA