Owen, Oliver S.,  1920- <br/><br/>
Natural resource conservation :  an ecological approach / 
Oliver S. Owen 
 - New York :  MacMillan,  1971 
 - xii, 593 p. :  ill. ;  27 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conservation of natural resources<br/>Ecology<br/>Environmental protection<br/>Conservation of natural resources--United States