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Julius Bartels has written:

'Geophysik I / Geophysics I'

'Collection of geomagnetic planetary indices Kp and derived daily indices, Ap and Cp, for the years 1932 to 1961' -- subject(s): Geomagnetism, Observations

'Geomagnetic data 1961, indices K and C'

'Schwankungen der Sonnenstrahlung, erdmagnetisch erschlossen' -- subject(s): Geomagnetism, Diurnal variations, Solar radiation

'Geomagnetic data, 1962, rapid variations' -- subject(s): Geomagnetism, Observations

'Geophysik' -- subject(s): Geophysics

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10y ago

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