Wilman, Charles W. <br/><br/>
Automatic telephony / 

 - 2nd ed. 
 - London :  Technical Press,  1938. 
 - vi, 208 p. :  ill. ;  20 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication engineering<br/>Telephone switching systems<br/>Telephone technology 
<br/><br/><label>Dewey Class. No.: </label>621.3857 WIL