TY  - BOOK
AU  - Black, Uyless D.
TI  - Data communications and distributed networks
SN  - 8120309251
U1  - 004.65 BLAU 
PY  - 1993///
CY  - New Delhi
PB  - PHI Learning Pvt Ltd
KW  - Data communications systems operations
KW  - Software and data bases
ER  -