00526nam a2200157 a 4500020002700000020003000027100004600057245005900103250001200162260005100174300001100225650002500236650001800261650001900279856007000298  a0070015392 (hardcover)  a9780070015395 (hardcover)1 a(AWWA), American Water Works Association.10aWater Quality and Treatment in Public Water Supplies /  a3rd ed.  a[S.l.] :bMcGraw Hill Higher Education,c1971.  a640 p.  aWater--Purification	  aWater-supply	  aUnited States	40uhttp://www.amazon.com/exec/obidos/ASIN/0070015392/chopaconline-20