Astronomical phenomena for the year ... .
Great Britain.Nautical Almanac Office.
Nautical Almanac Office (United States.
Washington U.S. Government Printing Office London : H.M.S.O,
1981-
"Prepared jointly by the Nautical Almanac Office, United States Naval Observatory and Her Majesty's Nautical Almanac Office, Royal Greenwich Observatory"
Vols. for 1951- previously issued by the Nautical Almanac Office, United States Naval Observatory, not held by NLS. ( prepared jointly with Her Majesty's Nautical Almanac Office, Royal Greenwich Observatory).
Astronomy