Ecological aspects of used-water treatment 
edited by C.R. Curds and H.A. Hawkes 
 - London  Academic Press  1975-1983 
 - 3 v.  ill  24 cm. 
<br/><br/>Contents: v. 1. The organisms and their ecology.--v. 2. Biological activities and treatment processes.--v. 3. The processes and their ecology 
<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>628.3