Dworsky, Leonard B <br/><br/>
Conservation in the United States:   Pollution  
/ Chelsea House Publishers 
 - New York:   Chelsea House Publishers,   1971 
 - xl, 911p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Subjects--Index Terms: </label>Air pollution 
<br/><br/><label>Universal Decimal Class. No.: </label>339.5(73)   / L1.2