TY  - BOOK
AU  - Gilbert Held
TI  - Understaning Data Communications,Ed7
SN  - 0000080736
U1  - 621.3821 
PY  - 2002///
CY  - New Delhi
PB  - Pearson
KW  -  Data
KW  -  Understaning
KW  - Communications,Ed7
KW  - Data communication
ER  -