Freedman, Bill <br/><br/>
Environmental science :  A Canadian perspective / 

 - 4th ed. 
 - Toronto:  Prentice Hall,  2007. 
 - xx, 652 p.:  ill.; 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0132000415 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental
<br/><br/><label>LC Class. No.: </label>GE160  .C3F74  2007