LEADER 01198nam  2200325Ka 450 
001 9910696822803321
005 20080729074952.0
035   $a(CKB)5470000002382657
035   $a(OCoLC)236465419
035   $a(EXLCZ)995470000002382657
100   $a20080729d1982      ua             0
101 0 $aeng
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aProbability of encountering coalbed discontinuities during vertical and horizontal borehole drilling$b[electronic resource] /$fby David W. Houseknecht
210  1$a[Pittsburgh, Pa.?] :$cU.S. Dept. of the Interior, Bureau of Mines,$d[1982]
215   $aii, 21 pages $cdigital, PDF file
225 1 $aReport of investigations ;$v8665
300   $aTitle from title screen (viewed on July 28, 2008).
606   $aCoal mines and mining
615  0$aCoal mines and mining.
700   $aHouseknecht$b David W$01381473
712 02$aUnited States.$bBureau of Mines.
801  0$bGPO
801  1$bGPO
906   $aBOOK
912   $a9910696822803321
996   $aProbability of encountering coalbed discontinuities during vertical and horizontal borehole drilling$93548469
997   $aUNINA