1.

図書
図書
1. Observations made during the year 1884 at the United States Naval Observatory
United States Naval Observatory ; Franklin, Commodore S. R.
出版情報: Washington : Government Printing Office, 1889
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2.

図書
図書
2. Observations made during the year ... at the United States Naval observatory (1883 - 1891)
United States Naval Observatory
出版情報: Washington : Government Printing Office, 1887-1899
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