TY  - BOOK
AU  - "Helmers,Scotta"
TI  - Data communications: A beginner's guide to concepts and technology
SN  - 9.78013E+12
U1  - 621.3981 HEL 
PY  - 1989///
KW  - Electrical Engineering
KW  - "Data,  communications"
N1  - "Faculty, students and Staff"
ER  -