TY  - BOOK
AU  - Hughes,Larry
TI  - Introduction to data communications: a practical approach 
SN  - 8173191794
AV  - TK5105 .H83 1997
U1  - 004.6 20
PY  - 1997///
CY  - New Delhi
PB  - Narosa Publishing House
KW  - Data transmission systems
N1  - Includes bibliographical references and index
ER  -