TY  - RPRT
TI  - Circular of the Bureau of Standards no. 557: worldwide radio noise levels expected in the frequency band 10 kilocycles to 100 megacycles
AU  - Crichlow, W Q
AU  - Morton, R N
AU  - Corliss, W R
PY  - 1955
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 557
DO  - 10.6028/NBS.CIRC.557
ER  -