The American worker's fact book. 

 - [Washington]  1956. 
 - xv, 433 p.  illus.  24 cm. 
<br/><br/><label>LCCN: </label>l  56000148  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labor and laboring classes--United States.
<br/><br/><label>LC Class. No.: </label>HD8051.A9  / L4