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Uesugi, T., Iwase, I., Koike, K. & Yoshida, A. A study on the K-index at Kakioka and Memambetsu Technical Report of the Kakioka Magnetic Observatory Vol.03 No.01, p.1, July 2005 [Abstract (HTML; in Japanese)] [Abstract (HTML; in English)][FULL TEXT (PDF; in Japanese; size:2869KB)]
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