TY  - BOOK
AU  - SHAY,William A.
TI  - Understanding Data Communications and  Networks
SN  - 978-254-966-8
AV  - 001.51 22
U1  - 001.51 3end 
PY  - 2004///
CY  - United States
PB  - Thomson Brooks/Cole
KW  - Computer
N1  - Includes Index
ER  -