000			00263nam a2200097 4500
100			_aBulman, O.M.B.
245			_aGeological Magazine, vol.101, (1-6) _cBulman, O.M.B.
260			_aUniversity of Chicago _c1964
260			_aUniversity of Chicago _c1964
942			_cCR
999			_c335226 _d335226