Okun, M. Arthur <br/><br/>
The battle against unemployment / 
Arthur M. Okun 
 - New York :  Norton & Company,  1972       
 - xxi, 248 p. 
<br/><br/><label>ISBN: </label>0393054462 
<br/><br/><label>LC Class. No.: </label>HD 5724 O41b 1972