000 00879n a2200277 4500
001 00952451
003 PWmBRO
005 20180324072546.0
008 910805s1990 dcua b f00010 eng
010 _a 90001809
069 _a 91045127
090 0 0 _aVF
_b622.334/S221b
100 1 0 _aSands, Paul F.
245 1 0 _aBlind pneumatic stowing in voids in abandoned mines /
_cby P.F. Sands, C.M.K. Boldt, and T.M. Ruff.
260 0 _aWashington, D.C. :
_bU.S. Dept. of the Interior, Bureau of Mines,
_c1990.
300 _a13 p. :
_bill.
490 1 _aInformation circular ;
_v9268
650 0 _aMine filling.
650 0 _aCompressed air.
650 0 _aAbandoned coal mines.
700 1 0 _aBoldt, C. M. K.
_q(Christine M. K.)
700 1 0 _aRuff, T. M.
830 0 _aInformation circular (United States. Bureau of Mines) ;
_v9268.
942 _2ddc
994 0 1 _a081026
999 _c63005
_d63005