Comparison of activity in solar cycles 18, 19, and 20
Dodson, Helen W., Hedeman, E. Ruth, Mohler, Orren C.Volume:
12
Year:
1974
Language:
english
Journal:
Reviews of Geophysics
DOI:
10.1029/rg012i003p00329
File:
PDF, 908 KB
english, 1974