National commission on labour analysis of replies 

 -  1969 
 - xvi,211p  cm. 
<br/><br/><label>Standard No.: </label>21,711 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Dewey Class. No.: </label>X:9455-5:2N69t, K9.1