International standard classification of occupations . 

 - Rev. ed. 1968 
 - Geneva :  ILO ,  1968 
 - v, 355p. ;  29 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labour law
<br/><br/><label>Dewey Class. No.: </label>331.026  / ILO