Johnson, Willis H. <br/><br/>
The environmental challenge, 

 - New York,  Holt, Rinehart and Winston  [1974] 
 - viii, 357 p.  illus.  23 cm. 
<br/><br/><label>ISBN: </label>0030841852 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.<br/>Environmental protection.
<br/><br/><label>Dewey Class. No.: </label>301 HOL 1974 A016 Or.