Introduction to line radio communication ... 
prepared for the Office of the chief signal officer, January, 1923. 
 - Washington,  Govt. Print. Off.,  1923. 
 - v, 51 p.  illus., diagrs.  23 cm. 
 - Radio communication pamphlet  no. 41 .
<br/><br/> On verso of t.-p.: War department. Document no. 1114. Office of the adjutant general.  "Prepared under the direction of the chief signal officer with the cooperation of the Bureau of Standards." 
<br/><br/><label>LCCN: </label>war23000016  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraph, Wireless.<br/>Radio.
<br/><br/><label>LC Class. No.: </label>TK5707  / .U6 no. 41