Introduction to social security.  Workers educational manual 

 - Geneva :  International Labour Office,  1970 
 - 220 p.  
<br/><br/><label>ISBN: </label>9221000486 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social security.
<br/><br/><label>Universal Decimal Class. No.: </label>316.323.65(035)