000 00295nam a2200109Ia 4500
001 23117
008 170722s9999 xx 000 0 und d
100 _aHelffrich, Friedrich
245 _aIon exchange. 1962. /
490 _aMcGraw-Hill series in advanced chemistry ed by David Hune
942 _cGEN
999 _c59697
_d59697