000			00258nam a2200097 4500
999			_c335685 _d335685
082			_a549.125 _bPHI.M
100			_aPhillips,W.R.
245			_aMineral optics:principles and techniques _cPhillips,W.R.
260			_aSan Francisco _c1971 _bW.H.Freeman
942			_cBK