1.

図書
図書
1. Dynamics and astrometry of natural and artificial celestial bodies : proceedings of IAU Colloquium 165, Poznań, Poland, July 1-5, 1996
edited by I.M. Wytrzyszczak, J.H. Lieske, R.A. Feldman
出版情報: Dordrecht ; Boston : Kluwer Academic Publishers, c1997
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2.

図書
図書
2. Preservation of near-earth space for future generations (: hard)
edited by John A. Simpson
出版情報: Cambridge ; New York : Cambridge University Press, 1994
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