1.

図書

図書
National Research Council (U.S.)
出版情報: Washington, D.C. : National Academy Press, 1981
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2.

図書

図書
National Research Council (U.S.)
出版情報: Washington : National Research Council, 1967
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3.

図書

図書
Task Group on Planetary Protection Space Studies Board Commission on Physical Sciences, Mathematics, and Applications National Research Council
出版情報: Washington, D.C. : National Academy Press, 1992
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