Treatment of industrial problems by constructive methods. 

 - Washington,  U.S. Govt. Print. Off.,  1919. 
 - 15 p.  23 cm. 
<br/><br/> At head of title: U.S. Department of Labor. Working Conditions Service, Grant Hamilton, director general. 
<br/><br/><label>LCCN: </label>l  19000035  
<br/><br/><label>Subjects--Corporate Names: </label><br/>United States. Working conditions service. 
<br/><br/><label>LC Class. No.: </label>HD7653  / .A5 1919a