000 00313nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a551 B5629
100 _aBETZ.F
245 0 _aENVIRONMENTAL GEOLOGY
260 _aPennsylvania
_bDowden, Hutchinson & Ross Publisher
_c1975
300 _a26X18
942 _cBK
_2DDC
999 _c19846
_d19846