TY  - BOOK
AU  - "Cheswick, Willilam R."
AU  - "Bellovin, Steven M."
TI  - Firewall and internet security
SN  - 0-201-63357-4
U1  - 005.8 
PY  - 1994///
CY  - U.S.A.
PB  - Addison Wesley
ER  -