Communication technology upgrade / 
August E. Grant & Jennifer H. Meadows [editors] 
 - 9th ed. 
 - Boston :  Focal Press ,  c2004 
 - viii, 372 p. :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label>0240806409 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication<br/>Technological innovations<br/>Communication
<br/><br/><label>Dewey Class. No.: </label>621.382