American magnetic character-figure,CA, three-hour-range indices,K, and meanK-indices,KA, for July to September, 1946
- 1 January 1946
- journal article
- Published by American Geophysical Union (AGU) in Journal of Geophysical Research
- Vol. 51 (4), 505
- https://doi.org/10.1029/te051i004p00505