Ecological aspects of used-water treatment / 
edited by Colin Robert Curds and Herbert Aubrey Hawkes 
 - London :  Academic Press,  1975 
 - 3 v. :  ill. ;  23 cm. 
<br/><br/> Library has Vol.1 
<br/><br/>Vol. 1. The organisms and their ecology.--v. 2. Biological activities and treatment processes.--v. 3. The processes and their ecology 
<br/><br/><label>ISBN: </label>0121995018 :  PND 12.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Microbiology<br/>Sewage--Purification--Biological treatment<br/>Freshwater ecology
<br/><br/><label>Dewey Class. No.: </label>628.16