George, N.Halm  .  <br/><br/>
Economics Systems ( Acompartive Analysis ) /  N.Halm.George. 

 - 3rd ed /  
 -  Bombay : Oxford Publishing ,   1976 
 - 117 ; NULL. 
<br/><br/><label>Dewey Class. No.: </label>330.9  / GEO