TY  - BOOK
AU  - Held, G
TI  - Understanding Data Communications
PY  - 2002///
CY  - New Delhi
PB  - Pearson Edu, New Delhi
KW  - Computer
N2  - Engineering
UR  - http://pws.npru.ac.th/sartthong/data/files/Understanding%20Data%20Communication%20From%20Fundamentals%20To%20Networking.pdf
ER  -