Halm, George M <br/><br/>
Eco Systems 

 - New Delhi  OXFORD & IBH PUBLISHING CO.  1976 
 - 420p. 
<br/><br/><label>Subjects--Uniform Titles: </label>--GENERAL STACK
<br/><br/><label>Subjects--Topical Terms: </label><br/> Social sciences--EconomicsEconomics
<br/><br/><label>Dewey Class. No.: </label>330  / HAL-E