000			00305nam a2200097Ia 4500
001			MPKV108821
008			120911s9999 xx 000 0 und d
245			_aJournal of American Water Works Association Vol.79 No.1-6 _c;
246			_aJournal of American Water Works Association Vol.64 No.1-10
260			_c1987
999			_c72172 _d72172