000			00498pam a2200133a 44500
082			_aUSBM _bRI-7695
100			_a
245	1		_aEXTRACTION OF MANGANESE FROM GEORGIA UMBER ORES BY A SULFURIC ACID-FERROUS SULFATE PROCESS(IN TWO PARTS) 2..COCURRENT EXTRACTION AND CENTRIFUGE TESTS
260			_a _bU. S. Dept. Of The Interior, Bureau Of Mines, [S. L.] _c1972
300			_a19
500			_aBound With Usbm Ri-7679-7694,7696-7698,Lack No. 7686-87,89,91,97
964			_gCIRC
997			_aTR14587 C
999			_c400277 _d400277