For use in training conscripted men for service as radio and buzzer operators (international code) in the United States Army. 
Issued by the Federal Board for Vocational Education, Washington. October, 1917. 
 - Washington,  Govt. Print. Off.,  1917. 
 - 14 p.  diagrs.  24 cm. 
 - Circular of information,  no. 1 .
<br/><br/> "No more Circulars of information issued. Merged into the Bulletin. Circular of information no. 1 is Bulletin 2." 
<br/><br/><label>LCCN: </label>e  18000074  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraph, Wireless.
<br/><br/><label>LC Class. No.: </label>LC1045  / .A3 no. 1