TY  - BOOK
AU  - Beyda,William J.
TI  - Basic data communications: a comprehensive overview 
SN  - 0130584215
PY  - 1989///
CY  - Englewood Cliffs, N.J. : 
PB  - Prentice Hall, 
KW  - Data transmission systems
N1  - Includes index; Bibliography: p. 251-256
ER  -