TY  - RPRT
TI  - Transfer characteristics of radio waves propagated between the ionosphere and the Earth at very low frequencies 
AU  - Johler, J R
AU  - Walters, L C
AU  - Lilley, C M
PY  - 1958
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 6002
DO  - 10.6028/NBS.RPT.6002
ER  -