Leonard S.Silk <br/><br/>
Contemporary economics :principles and issues / 
Silk L.S. 
 - New york :  Mcgraw -hill ;  1970. 
 - 407 pages. 
<br/><br/>includes index. 
<br/><br/><label>LC Class. No.: </label>HB 171.5  / .S55 1970