Improving water quality management planning in nonmetropolitan areas 

 - U.S. Environmental Protection Agency (EPA)  Washington  1973 
 - 75p. 
<br/><br/><label>Nat. Bib. No.: </label>3658 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>626/628.17  / AMA