United States Department of Labor <br/><br/>
American Workers Fact Book 

 - Washington  United States Department of Labor  1956 
 - xv,433 p.  PB  23x15 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Working class<br/>United States
<br/><br/><label>Dewey Class. No.: </label>331.0973  / UNIA