TY  - BOOK
AU  - Black,Uyless D.
TI  - Data communications and distributed networks
SN  - 0132034646
AV  - TK5105 .B576 1993
U1  - 004.6 
PY  - 1993///
CY  - New Delhi
PB  - Prentice Hall
KW  - Data transmission systems
KW  - Computer networks
KW  - Electronic data processing
ER  -