TY  - BOOK
AU  - Ramos, Emilio.
TI  - Concepts of data communications
SN  - 0024077747
U1  - 004.6 R1474 Co 
PY  - 1994///
CY  - New York
PB  - Macmillan
KW  - Data transmission systems
N1  - Includes index
ER  -