TY  - BOOK
AU  - Shay,William A.
TI  - Understanding data communications and networks
SN  - 0-534-38317-3
U1  - 004.6 
PY  - 2004///
CY  - CA
PB  - Wadsworth Publ.
KW  - Computer networks
KW  - Data transmission systems
KW  - DATA PROCESSING
ER  -