Geomagnetic indices K and C, 1951
Bartels, Julius
Geomagnetic indices K and C, 1951 Julius Bartels and J. Veldkamp - Washington, D. C. International Union of Geodesy and Geophysics 1952 - vi+106p. - International Association of Terrestrial Magnetism and Electricity Bulletin; No. 12f .
Iatme Bulletin No.12fIaga Bulletin-dataIaga IndicesIatme BulletinIugg
550.38 / IAGA
Geomagnetic indices K and C, 1951 Julius Bartels and J. Veldkamp - Washington, D. C. International Union of Geodesy and Geophysics 1952 - vi+106p. - International Association of Terrestrial Magnetism and Electricity Bulletin; No. 12f .
Iatme Bulletin No.12fIaga Bulletin-dataIaga IndicesIatme BulletinIugg
550.38 / IAGA