TY  - BOOK
AU  - Johnson,Charles D.
AU  - Johnson,Charles D.
TI  - Communication systems
SN  - 1566376157
AV  - P96.T42 .J62 2000
PY  - 2000///
CY  - Tinley Park
PB  - Goodheart-Willcox Co.
N1  - Includes index
ER  -