TY  - BOOK
AU  - Tisal,Joachim
TI  - The GSM network GPRS evolution:one step towards UMTS
SN  - 0471498165
U1  - 621.382 TIS 
PY  - 0000///0
CY  - New York
PB  - John Wiley & Sons
N1  - Includes bibliographical references
ER  -