TY  - BOOK
AU  - Held, Gilbert
AU  - Sarch, Ray
TI  - Data Communications Comprehensive Approach 
SN  - 0076000036
U1  - 621.382 
PY  - 1983///
CY  - New York : 
PB  - McGraw-Hill, 
KW  - Data Transmission Systems
N1  - NN
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-07-600003-6.pdf
ER  -