TY  - BOOK
AU  - Brewster,R.L.
TI  - Data communications and networks
SN  - 9780070472976
U1  - 004.6 
PY  - 2002///
CY  - London
PB  - TATA McGraw hill
KW  - Data transmission systems
KW  - Computer networks
N1  - Includes bibliographies and index
ER  -