000 00296nam a2200097Ia 4500
008 211215s9999 xx 000 0 und d
040 _cJayakar Knowledge Resource Centre
245 0 _aGeological survey professional paper: 290
260 _bU-S Govt. printing office
_aWashington
_c1957
942 _c1
999 _c102601
_d102601