000			00336nam a2200145Ia 4500
008			140317s9999 xx 000 0 und d
082			_a552
100			_aTyrrell,G.W.
245		4	_aThe principles of petrology.
260			_aBombay _bAsia _c1962
300			_a349
650			_aEarth Science.
653			_aPetrology
942			_2ddc _cBK
999			_c3479 _d3479