000			00329nam a2200145Ia 4500
008			170101s1956 xx 000 0 und d
082			_a552 H51M
100			_aHEINRICH, E. Wm.
245		0	_aMicroscopic petrography.
260			_bN.Y. _c1956
300			_a296p.
650			_aPETROLOGY
653			_aPETROLOGY
942			_2ddc _cB
999			_c9081 _d9081