Eberspacher,  Jorg. Jorg Vogel,Hans. Bettstetter,Christian. <br/><br/>
GSM Switching, Services and Protocols, Second Edition. 

 - 2 
 - Chichester  Wiley  2001 
 - xiv+332p.,25X17Cms. 
<br/><br/><label>ISBN: </label>047149903X 
<br/><br/><label>Dewey Class. No.: </label>621.384 E16