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Solar and Lunar Geomagnetic Variations at Nurmijärvi (1953 ... 1973)
Jagdish Chandra Gupta
出版Ilmatieteen laitos, 1981
ISBN95169713269789516971325
URLhttp://books.google.com.hk/books?id=V6FLAAAACAAJ&hl=&source=gbs_api