1.

図書
図書
1. Instruments and publications of the United States Naval observatory
United States Naval Observatory
出版情報: Washington : Published by authority of the Hon. secretary of the Navy, 1845-1876
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2.

図書
図書
2. Results of observations made at the United States Naval observatory with the transit instrument and mural circle in the years 1853 to 1860, inclusive
By M. Yarnall, James Major, T.J. Robinson. Prepared by M. Yarnall, by order of B.F. Sands
出版情報: Washington : Govt. print. off., 1872
シリーズ名: Washington observations ; 1871 appendix 2
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