TY  - BOOK
AU  - Hughes,Larry
TI  - Introduction to data communications: a practical approach 
SN  - 0867207450 :
U1  - 004.6 
PY  - 1997///
CY  - London
PB  - Jones and Bartlett
KW  - Data transmission systems
N1  - Includes bibliographical references and index
ER  -