Coursey, Philip Roy <br/><br/>
Telephony without wires/ 
Philip R. Coursey 
 - London:  Wireless Press,  1919 
 - xix, 414 p.:  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraphy, Wireless<br/>Wirelss communication systems<br/>Telegraph<br/>Mobile communication systems
<br/><br/><label>Dewey Class. No.: </label>621.3845