Stow, Ben J. <br/><br/>
Lectures on telegraphy duplex,suadrwplex and other circuits, transformer and testing  / 
Ben J. Stow 
 - 2nd 
 - Calcutta :  Thacker,  1897 
 - vii,82 p. :  ill.  ;  21 cm. 
<br/><br/><label>ISBN: </label> Rs.