TY  - BOOK
AU  - Comer, Douglas, E 
TI  - Computer netwrks and internets 
SN  - 0-13-239070-1 
U1  - 004.6 COM  
PY  - 1997///
CY  - Prentice hall 
PB  - New Jersey 
KW  - COMPUTER NETWORK
ER  -