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2. Comparisons of cylindrical electrostatic probe measurements on Alouette II and Explorer XXXI satellites;Brace,1969
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4. Cylindrical electrostatic probe employed on Alouette II and Explorer XXXI satellites;Findlay,1969
5. Ionospheric and magnetic observations at 1000 km during the geomagnetic storm and aurora of 25–26 MAY, 1967;Findlay;J. geophys. Res.,1969