Clark, John W <br/><br/>
Water supply and pollution control 

 - 3rd ed. 
 - New York:   IEP-A Dun Donnelley Publishers,   1977 
 - 857p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Subjects--Index Terms: </label>Sewage Biological treatment 
<br/><br/><label>Universal Decimal Class. No.: </label>628.1  / L7