共 7 条
[2]
[Anonymous], 1944, TERR MAGN ATMOS ELEC, DOI DOI 10.1029/TE049I004P00243
[4]
HUTTLY NA, 1957, MARCONI REV, V20, P117
[5]
AN ESTIMATE OF PEAK SUNSPOT NUMBER IN 1968
[J].
JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS,
1961, 20 (2-3)
:94-&
[6]
THE SUNSPOT CYCLE, 649-BC TO AD-2000
[J].
JOURNAL OF GEOPHYSICAL RESEARCH,
1955, 60 (02)
:127-146
[7]
Waldmeier M., 1961, SUNSPOT ACTIVITY YEA