Ionospheric data; observations on Board the "Soya" en route between Japan and Antarctica.
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Item Link | Original Source |
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Limited (search only) 1956-57 | University of California |
Limited (search only) 1958-59 | University of California |
Limited (search only) 1959-60 | University of California |
Limited (search only) 1960-61 | University of California |