Papps, I V Y <br/><br/>
Models and economic theory 
I V Y Papps 
 - Philadelphia  W.B. Saunders Company  1977 
 - ix,131p. 
<br/><br/><label>ISBN: </label>0721670636 
<br/><br/><label>Dewey Class. No.: </label>330.0151 P199 M