TY  - RPRT
TI  - Some methods for general prediction of sudden ionospheric disturbances 
AU  - Shapley, A H
AU  - Lincoln, J V
PY  - 1947
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CRPL 1-3
DO  - 10.6028/NBS.CRPL.1-3
ER  -