※一部利用できない機能があります
1.
図書 |
edited by James R. Brown ; assisted by H.B. Goodwin
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2.
図書 |
United States Naval Observatory
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3.
図書 |
by Simon Newcomb
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4.
図書 |
by W. Henryh Northcott
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5.
図書 |
United States. Dept. of Commerce. Coast and Geodetic Survey
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6.
雑誌 |
Dun Echt Observatory
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