000			00498pam a2200145a 44500
082			_aUSBM _bRI-7772
100			_aTomb,T F,Treaftis,H N
245	1		_aCOMPARISON OF RESPIRABLE DUST CONCENTRATIONS MEASURED WITH MRE AND MODIFIED PERSONAL GRAVIMETRIC SAMPLING EQUIPMENT.
260			_a _bU. S. Dept. Of The Interior, Bureau Of Mines, [S. L.] _c1973
300			_a29
500			_aBound With Usbm Ri-7771,7773-7790 Lack No. 7775.
700			_aMundell,R L
964			_gCIRC
997			_aTR11094 C
999			_c396044 _d396044