000			00272nam a2200097 4500
999			_c335164 _d335164
082			_a551.493 _bSCH.P
100			_aSchaeffer,O.A. and Zahringer,J
245			_aPotassium Argon dating _cSchaeffer,O.A. and Zahringer,J
260			_aNewYork _c1966 _bSpringer-verlag
942			_cBK