Dasmann, R. F.  1919- <br/><br/>
Environmental conservation / 
Raymond F. Dasmann 
 - 4th ed. 
 - New York :  John Wiley & Sons,  1976 
 - xi, 427 p. :  ill. ;  24 cm . 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>ISBN: </label>0471196029 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conservation of natural resources<br/>Ecology<br/>Human ecology