1.

図書
図書
1. The American ephemeris and nautical almanac for the year 1970
issued by the Nautical Almanac Office United States Naval Observatory, Her Majesty's Nautical Almanac Office Royal Greenwich Observatory
出版情報: Washington : U.S. G.P.O., 1968
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2.

図書
図書
2. The American ephemeris and nautical almanac for the year 1971
issued by the Nautical Almanac Office United States Naval Observatory, Her Majesty's Nautical Almanac Office Royal Greenwich Observatory
出版情報: Washington : U.S. G.P.O., 1969
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3.

図書
図書
3. Man is not lost : a record of two hundred years of astronomical navigation with The Nautical Almanac, 1767-1967 published jointly for the National Maritime Museum [and] The Royal Greenwich Observatory
National Maritime Museum (Great Britain) ; Royal Greenwich Observatory
出版情報: London : Her Majesty's Stationaery Office, 1968
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