Labor spy / 
GT-99. 
 - 1st ed 
 - Indianapolis, New York :  The Bobbs-Merrill Company,  1937. 
 - 309 pages ;  23 cm. 
 - 343.321(73)(09) (NLA) .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Working class--United States<br/>Spies<br/>Labor unions--History--United States--1913-1921
<br/><br/><label>Universal Decimal Class. No.: </label>343.321(73)(09) (NLA)