TY  - BOOK
AU  - Doll,Dixon R.
TI  - Data communications: facilities, networks, and systems design 
SN  - 0471217689
U1  - 384 23
PY  - 1978///
CY  - New York
PB  - Wiley
KW  - Data transmission systems
KW  - Computer networks
N1  - Includes bibliographical references and index
ER  -