000			00449pam a2200145a 44500
082			_aUSBM _bRI 7805
100			_aKrickovic,S,Moore, Jr,T D
245	1		_aBLEEDER SYSTEM IN VIRGIN AREA INA A PITTSBURGH COALBED MINE.
260			_a _bU. S. Dept. Of The Interior, Bureau Of Mines, [S. L.] _c1973
300			_a8
500			_aBounds With Usbm Ri 7801-04, 7806-7820 Lack No. 7814
700			_aCarpetta,J E
964			_gCIRC
997			_aTR8047 C
999			_c395871 _d395871