TY  - BOOK
AU  - Eberspacher,Jorg
AU  - Vogel,Hans-Jorg
AU  - Bettstetter,Christian
TI  - GSM: switching ,services and protocols 
SN  - 047149903x
AV  - TK5103.483 .E2413 2001
U1  - 621.3822 
PY  - 2001///
CY  - Chichester
PB  - John Wiley
KW  - Global system for mobile communications
ER  -