68th Annual International Water Conference 2007, October 21-25, 2007, Orlando, Florida, USA / 
Engineers Society of Western Pennsylvania 
 - Pennsylvania :  Engineers Society of Western Pennsylvania,  [2007] 
 - 2 v. :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label>9781605600741  RM478.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Purification<br/>Water--Purification--Biological treatment<br/>Water--Purification--Technological innovations