Owen, Oliver S.,  1920- <br/><br/>
Natural resource conservation :  an ecological approach / 
Oliver S. Owen 
 - 2nd ed. 
 - New York :  MacMillan,  1975 
 - xiv, 700 p. :  ill. ;  27 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>0023900105 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conservation of natural resources<br/>Ecology