TY  - BOOK
AU  - Beyda,William J.
TI  - Data communications: from basics to broadband 
SN  - 0130961396
U1  - 004.6 BEY 
PY  - 2000///
CY  - Upper Saddle River, NJ
PB  - Prentice Hall
KW  - Data transmission systems
N1  - Includes bibliographical references
ER  -