TY  - RPRT
TI  - Ionospheric and radio propagation disturbances. October 1943 through February 1945 
PY  - 1945
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IRPL 13
DO  - 10.6028/NBS.IRPL.13
ER  -