000 00287nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a552 W7234
100 _aWILLIAMS.H
245 0 _aPETROGRAPHY
260 _aSan Francisco
_bFREEMAN AND CO
_c1954
300 _a24X15
942 _cBK
_2DDC
999 _c12029
_d12029