International Labour Office. <br/><br/>
International Standard Classification of Occupations 

 - 1949. 
 - [s.l:  International Labour Office,  1949. 
 - II;139p. 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Statistics, Methods of Classification, The uses of Occupational Data.
<br/><br/><label>Dewey Class. No.: </label>G1 I 14