Mr. Manager, guard your investment in manpower. 

 - [Washington,  U.S. Govt. Print. Off.,  1953] 
 - [16] p.  illus.  21 cm. 
 - Its Bulletin,  no. 164 .
 - Bulletin (United States. Bureau of Labor Standards) ;  164. .
<br/><br/><label>LCCN: </label>l  53000126  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Machinery--Safety appliances.
<br/><br/><label>LC Class. No.: </label>HD7273  / .U53 1953 
<br/><br/><label>Dewey Class. No.: </label>331.823