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  1. 1
    Published 1957
    Subjects “...International Geophysical Year, 1957-1958 Periodicals....”
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    IGY solar activity report series.
  2. 2
    Published 1958
    Subjects “...International Geophysical Year, 1957-1958 Periodicals....”
    Journal
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    IGY rocket report series.
  3. 3
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    Information on Soviet bloc international geophysical cooperation.

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