TY  - BOOK
AU  - Cannon, Don L.
TI  - Understanding Communications Systems
SN  - 0895121662
U1  - 004.678 CAN 
PY  - 1984///
CY  - USA
PB  - ; Texas
KW  - Understanding Communications Systems
KW  - Communications Systems
KW  - Don L. Cannon
ER  -