TY  - BOOK
AU  - Thorpe,Nicolas M.
AU  - Ross,Derek
TI  - X.25 made easy
SN  - 0139721835
U1  - TK/5105.5 
PY  - 1992///
CY  - New York
PB  - Prentice Hall
KW  - Computer network protocols.
KW  - Packet switching (Data transmissions).
ER  -