Year book of labour statistics 1991 / 
International Labour Office. 
 - 50th edition 
 - Geneva :  International Labour Office ,  ©1991. 
 - xvii, 1132 pages :   31 cm  
<br/><br/> Includes index.  
<br/><br/><label>ISBN: </label>97809220073391 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labor --Statistics --Periodicals