Kelly, Mary Lavina. <br/><br/>
Productivity trends in selected industries :  indexes through 1950. 

 - Washington :  U.S. Govt. Print. Off.,  [1951]. 
 - iv, 83 p. ;  26 cm. 
 - U. S. Bureau of Labor Statistics.  Bulletin ;  no. 1046 .
 - Bulletin (United States. Bureau of Labor Statistics) ;  1046. .
<br/><br/><label>LCCN: </label>l  51000175  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Labor productivity--United States.
<br/><br/><label>LC Class. No.: </label>HD8051  / .A62 no. 1046