International standard classification of occupations . 

 - Geneva :      ILO ,  1958     
 - 236p. ;  32 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labour law<br/>Occupations
<br/><br/><label>Dewey Class. No.: </label>331.026  / ILO