Van Dyne, George M. <br/><br/>
The ecosystem concept in natural resource management 

 - New Yor :  Academic Press,  1969 
 - 383 p.  : ilus. 
<br/><br/><label>LCCN: </label>47430 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecosistema.<br/>Recursos naturales--Utilización.
<br/><br/><label>Dewey Class. No.: </label>581.5  / V3