The American ephemeris and nautical almanac for the year 1971
By: Washington, issued by the Nautical Almanac Office, United States Observatory ...  ; London, issued by Her Majesty's Nautical Almanac Office ... under the title 'The astronomical ephemeris.
Contributors: Royal Greenwich Observatory. Nautical Almanac Office.; United States Naval Observatory. Nautical Almanac Office.
Publisher: U.S.G.P.O.
Published: 1969
Place of publication: Washington
Language: eng
Other titles: The astronomical ephemeris.