LEADER 00592nam  2200157z- 450 
001 9910689829403321
035   $a(CKB)5470000002333079
035   $a(EXLCZ)995470000002333079
100   $a20230503c1976uuuu  -u-            -
101 0 $aeng
200 10$aLongwall gob degasification with surface ventilation boreholes above the Lower Kittanning coalbed
210   $aWashington$cU.S. Dept. of the Interior, Bureau of Mines
906   $aBOOK
912   $a9910689829403321
996   $aLongwall gob degasification with surface ventilation boreholes above the Lower Kittanning coalbed$93193488
997   $aUNINA