1.

図書
図書
1. Sixth General Assembly, held at Stockholm, August 3 to August 10, 1938
edited by J.H. Oort
出版情報: Cambridge : The University Press, 1939
シリーズ名: Transactions of the International Astronomical Union ; v. 6
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2.

図書
図書
2. Fifth general assembly, held at Paris, July 10 to July 17, 1935
edited by F.J.M. Stratton
出版情報: Cambridge : Cambridge University Press, 1936
シリーズ名: Transactions of the International Astronomical Union ; v. 5
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