TY  - BOOK
AU  - Helmers,Scotta
TI  - Data communications: A beginner's guide to concepts and technology
SN  - 9780131988705
U1  - 621.3981 HEL 
PY  - 1989///
KW  - Electrical Engineering
KW  - Data,  communications
N1  - Faculty, students and Staff
ER  -