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美国政府科技报告
>Experimental and theoretical study of ionos- pheric electron content and upper ionosphere ionic processes by means of satellite radio transmissions semiannual report, 1 nov. 1964 - 30 apr. 1965
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Experimental and theoretical study of ionos- pheric electron content and upper ionosphere ionic processes by means of satellite radio transmissions semiannual report, 1 nov. 1964 - 30 apr. 1965