International standard classification of occupations . 

 - Geneva :  ILO ,  1949 
 - 139p. ;  25 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