The magnetic storm of May 13–16, 1921, at Apia Observatory, Samoa
Open Access
- 1 March 1921
- journal article
- Published by American Geophysical Union (AGU) in Terrestrial Magnetism and Atmospheric Electricity
- Vol. 26 (1-2) , 30-31
- https://doi.org/10.1029/te026i001p00030