TY  - BOOK
AU  - Doll, Dixon R.
TI  - Data communications: facilities, networks, and systems design 
SN  - 0471217689
U1  - 004.6 D69 Da 
PY  - 1978///
CY  - New York
PB  - Wiley
KW  - Data transmission systems
N1  - "A Wiley-Interscience publication."
ER  -