TY  - GEN
AU  - Stallings, William
AU  - Stallings, William
TI  - Network security essentials: applications and standards.- 3rd Ed.
SN  - 9788131716649
U1  - 004.056:7 STA 
PY  - 2009///
CY  - New Delhi
PB  - Pearson
KW  - Network security
ER  -