The ecosystem concept in natural resource management / 
edited by George M. Van Dyne 
 - New York :  Academic Press,  1969 
 - xii, 383 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label> USD 16.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Congresses<br/>Conservation of natural resources--Congresses<br/>Ecosystem management--Congresses
<br/><br/><label>Dewey Class. No.: </label>574.5