TY  - BOOK
ED  - National Bureau of Standards,
TI  - Radio instruments and measurements
U1  - 621.3841 
PY  - 1947///
CY  - Washington
PB  - U S Government Printing office
KW  - Radio Communication
KW  - Signal Measurement
KW  - Radio Wave Propagation
N1  - Circular of National Bureau of Standards C74
ER  -