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EGAN RD, 1962, IONOSPHERIC SPORADIC, P89
[4]
Leighton H. I., 1962, IONOSPHERIC SPORADIC, P166
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Matsushita S., 1962, IONOSPHERIC SPORADIC, P344
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SMITH EK, 1962, IONOSPHERIC SPORA ED, P89
[7]
SMITH EK, 1962, IONOSPHERIC SPORA ED, P166
[8]
SMITH EK, 1962, IONOSPHERIC SPORA ED, P344
[9]
SMITH EK, 1962, IONOSPHERIC SPORADIC, P183
[10]
SMITH EK, 1962, IONOSPHERIC SPORA ED, P276