Owen, Oliver S.,  1920- <br/><br/>
Natural resource conservation :  an ecological approach  / 
Oliver S. Owen. 
 - New York :  Macmillan,  c1971. 
 - xii, 593 p. :  ill., maps. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--United States.<br/>Conservation of natural resources--United States.