Cole, Marion. <br/><br/>
Introduction to telecommunications voice data and the internet 

 - 2nd edition. 
 - Delhi :  Pearson Education,  1994 
 - 608. 
<br/><br/><label>ISBN: </label>8178089734  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Applied physics
<br/><br/><label>Dewey Class. No.: </label>621.383  / COL