Bates, R. J. <br/><br/>
Voice and data communications handbook 
R J. Bates and Donald W. Gregory                                                  
 - 4th ed. 
 - NewDelhi  Tata McGraw-Hill  2001 
 - xxviii,1074p. 
<br/><br/><label>ISBN: </label>0-07-047281-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data communications<br/>Telecommunications<br/>Telephone network
<br/><br/><label>Universal Decimal Class. No.: </label>621.39  / BAT