World unemployment /  
Peter Dietrich. 
 - Moscow :   Centrizdat,  1931. 
 - 36 p. :  15 cm. 
 - 331.6 (NLA) .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Unemployment
<br/><br/><label>Universal Decimal Class. No.: </label>331.6 (NLA)