Van Dyne Geroge M Ed. <br/><br/>
Ecosystem concept in natural resource management 

 - New York       Academic Press         1969 
 - xii,383p.  cm. 
<br/><br/><label>Standard No.: </label>39627 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>G:5, K9