共 2 条
[1]
A MONTHLY IONOSPHERIC INDEX OF SOLAR ACTIVITY BASED ON F2-LAYER IONIZATION AT 11 STATIONS
[J].
JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS,
1960, 18 (04)
:297-305
[2]
LONG TERM VARIATION IN RELATIONSHIP OF SUNSPOT NUMBERS TO E-REGION CHARACTER FIGURES
[J].
JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS,
1961, 21 (2-3)
:167-&