Berkeley, G. S <br/><br/>
Traffic and trunking principles in automatic telephony 
G. S Berkeley 
 - 2nd ed. 
 -  1949 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telephone, Automatic
<br/><br/><label>Subjects--Geographic Terms: </label>--EL, Comm
<br/><br/><label>Dewey Class. No.: </label>621.38775 BER