1.

図書
図書
1. Assault on the unknown : the international Geophysical Year. [1st ed.]
Walter Sullivan
出版情報: New York : Mcgraw-Hill, c1961
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2.

図書
図書
2. IGY : year of discovery : the story of the International Geophysical Year
by Sydney Chapman
出版情報: Ann Arbor : University of Michigan Press, c1959
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