Electrical instruments and telephones of the U.S. Signal corps. 

 - Revised 1910. 
 - Washington,  Govt. print. off.,  1911. 
 - 332p.  illus., diagrs.  24cm. 
 - Its  Manual  no. 3 .
 - United States.  Army.  Signal Corps.  Manual  no. 3. .
<br/><br/> "War department. Document no. 378. Office of the Chief signal officer of the army." 
<br/><br/><label>LCCN: </label>war11000034  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Military telegraph--United States.<br/>Military telephone--United States.
<br/><br/><label>LC Class. No.: </label>UG590  / .U63 1910