Category:地磁気及空中電気観測報告
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This is the category for the Japanese book 地磁気及空中電気観測報告. |
日本語:地磁気及空中電気観測報告
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NDL831044 地磁気及空中電気観測報告 明治30年分.pdf 7,937 × 5,070, 57 pages; 137.96 MB