NELSON, Darby <br/><br/>
Environmental Science:  A Global Concern 
Darby Nelson 
 - 4th edition 
 - Boston  The McGraw-Hill  c1997 
 - 275p.:  ill.; 
<br/><br/><label>ISBN: </label>0697286738 
<br/><br/><label>Dewey Class. No.: </label>333.73