000 00268nam a2200097 4500
999 _c335804
_d335804
082 _a551.701
_bHAR.G
100 _aHarper,C.T.,Ed.
245 _aGeochronology:Radiometric dating of rocks and minerals
_cHarper,C.T.,Ed.
260 _aPennsylvania
_c1973
_bDH&R
942 _cBK