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- [3] SOME OBSERVATIONS OF OCCURRENCE AND MOVEMENT OF SPORADIC-E IONIZATION JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1961, 20 (04): : 243 - &
- [9] SOME HIGH FREQUENCY OBSERVATIONS OF EQUATORIAL SPORADIC-E IRREGULARITIES ANNALES DE GEOPHYSIQUE, 1966, 22 (03): : 368 - +
- [10] A SEQUENCE OF ROCKET OBSERVATIONS OF NIGHT-TIME SPORADIC-E JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1970, 32 (07): : 1247 - &