000 00293nam a22000977a 4500
082 _a540
_bWIL.N
100 _aWilliams, R J P
_aFrausto, Da Silva
245 _aNatural selection of the chemical elements: Environment and life's chemistry
260 _aOxford
_bClarendon press
_c1996
942 _cBK
999 _c211933
_d211933