000			00290nam a2200109 4500
999			_c334082 _d334082
082			_a549 _bROG.O
100			_aRogers,Austin F. and Kerr,Paul F
245			_aOptical mineralogy _cRogers,Austin F. and Kerr,Paul F
250			_aSecond
260			_aNew York _c1942 _bMc Graw Hill
942			_cBK