1.

図書
図書
1. The American ephemeris and nautical almanac for the year 1969
issued by The Nautical Almanac Office United States Naval Observatory
出版情報: Washington : U.S.Government printing office, 1967
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2.

雑誌
雑誌
2. The Astrophysical journal
American Astronomical Society
出版情報: Chicago : University of Chicago Press, 1895-c1967
巻次（年次）: Vol. 1 (Jan./May 1895)-v. 147 (Jan./Mar. 1967)
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