TY  - BOOK
AU  - Beatty,R.T.
AU  - Sowerby,J.McG
TI  - Radio data charts: a series of forty-three abacs providing most of the essential data required in receiver design 
U1  - 621.384084 
PY  - 1977///
CY  - New Delhi
PB  - Business Promotion Publications
KW  - Radio -- Tables
ER  -