000			00406pam a2200145a 44500
082			_aUSBM _bRI 7819
100			_aCheng,L,Emmerling,J E
245	1		_aCOLLECTION OF AIRBORNE COAL DUST BY STEAM.
260			_a _bU.S. Bureau Of Mines, Washington, D.C. _c1974
300			_a13
500			_aBounds With Usbm Ri 7801-7818, 7820 Lack No. 7814
700			_aTomb,T F
964			_gCIRC
997			_aTR8060 C
999			_c395284 _d395284