000			00306nam a2200097Ia 4500
001			MPKV108820
008			120911s9999 xx 000 0 und d
245			_aJournal of American Water Works Association Vol.79 No.1-12 _c;
246			_aJournal of American Water Works Association Vol.64 No.1-10
260			_c1972
999			_c72171 _d72171