000			00446pam a2200145a 44500
082			_aUSBM _bRI-7677
100			_aKoech,George S
245	1		_aSAMPLE PREPARATION VARIABILITY IN DIAMOND-DRILL CORE FROM THE HOMESTAKE MINE,LEAD,S.DAK.
260			_a _bU. S. Dept. Of The Interior, Bureau Of Mines, [S. L.] _c1972
300			_a14
500			_aBound With Usbm Ri-7667,7678
700			_aLink,Richard F
964			_gCIRC
997			_aTR14599 C
999			_c400289 _d400289