000 00279nam a2200121Ia 4500
008 160710s1991 xx 000 0 und d
082 _a6280162 WHO
100 _aWHO
245 _aGUIDELINES FOR DRINKIND WATER QUALITY
260 _bCBS
_c1991
300 _a333
942 _2ddc
_cB
999 _c55049
_d55049