TY  - BOOK
AU  - Shay,William A.
TI  - Understanding data communications and networks
SN  - 0534383173 (hbk.)
U1  - 004.6 
PY  - 2004///
CY  - Belmont, Calif.
PB  - Thomson Brooks/Cole
KW  - Data transmission systems
KW  - Computer networks
N1  - Includes index
ER  -