TY  - BOOK
AU  - Shay,William A.
TI  - Understanding data communications and networks
SN  - 9788178001791
U1  - 004.738.5 
PY  - 2010///
CY  - Hyderbad, B S Publications
PB  - Thomson Brooks/Cole
KW  - Data transmission systems
KW  - Computer networks
UR  - http://www.loc.gov/catdir/enhancements/fy1302/2003109625-b.html
UR  - http://www.loc.gov/catdir/enhancements/fy1302/2003109625-d.html
UR  - http://www.loc.gov/catdir/enhancements/fy1302/2003109625-t.html
ER  -