TY  - GEN
AU  - Held, Gilbert
AU  - Sarch, Ray
TI  - Data Communications: A Comprehensive Approach
T2  - Data Communications Book Series
SN  - 0076070026
U1  - 005.71 
PY  - 1989///
CY  - New York
PB  - McGraw-Hill Information Services Company
KW  - Data Communications
ER  -