Van Dyne George M ed <br/><br/>
Ecosystem concept in natural resource management 

 -  1969 
<br/><br/><label>Standard No.: </label>90,578 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEOGRAPHY
<br/><br/><label>Dewey Class. No.: </label>U6710G:5z7, K9-;1