1.

図書
図書
1. Gas dynamics of cosmic clouds : a symposium held at Cambridge, England, July 6-11, 1953
International Astronomical Union. Symposium ; International Astronomical Union ; International Union of Theoretical and Applied Mechanics
出版情報: Amsterdam : North-Holland, 1955
シリーズ名: Symposium / International Astronomical Union ; no. 2
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2.

図書
図書
2. Co-ordination of galactic research
edited by A. Blaauw
出版情報: Cambridge [Eng.] : The University Press, 1955
シリーズ名: Symposium / International Astronomical Union ; no. 1
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