Helfman, E.S. <br/><br/>
Rivers and watersheds in America's future 

 - David McKay Company  New York  1965 
 - 244 
 - Dams Mississippi river Colorado river River pollution Water pollution 
 = Helfman, E.S. 
<br/><br/><label>Standard No.: </label>M 
<br/><br/><label>Standard Tech. Report. No.: </label>
<br/><br/><label>LCCN: </label>B 
<br/><br/><label>Nat. Bib. No.: </label>0613 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>577.4(73) HEL 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Sciences
<br/><br/><label>Universal Decimal Class. No.: </label>577.4(73)