Chorafas, Dimiris. N <br/><br/>
Telephony Today and Tomorrow 

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 - Englewood Cliffs,  Prentice-Hall of India  1984 
 - xii, 292 p.   
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<br/><br/><label>Subjects--Index Terms: </label>Telephony 
<br/><br/><label>Dewey Class. No.: </label>621.395.12