1.

図書
図書
1. IXth International astronautical congress, Amsterdam, 1958 = IX Internationaler Astronautischer Kongress = IXe Congres International D'Astronautique : proceedings (v. 1 ; v. 2)
International Astronautical Congress
出版情報: Wien : Springer, 1959
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2.

図書
図書
2. VIIIth International Astronautical Congress, Barcelona, 1957 = VIII. Internationaler Astronautischer Kongress = VIIIe Congres International D'Astronautique : proceedings
International Astronautical Congress
出版情報: Wien : Springer-Verlag, 1958
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