TY  - RPRT
TI  - A nomographic method for both prediction and observation correlation of ionosphere characteristics 
AU  - Phillips, M L
PY  - 1945
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IRPL 11
DO  - 10.6028/NBS.IRPL.11
ER  -