Marth, A., "Ephemeris of the Satellite of Neptune 1891-1892" and "Ephemeris for Physical Observations of the Moon, 1891 Nov. 9 to Dec. 25" and "Ephemerides of the Satellites of Saturn 1891-1892" from the Monthly Notices of the Royal Astronomical Society, Vol. LI, No. 9, Sup., 1891

Marth, A., "Ephemeris of the Satellite of Neptune 1891-1892" and "Ephemeris for Physical Observations of the Moon, 1891 Nov. 9 to Dec. 25" and "Ephemerides of the Satellites of Saturn 1891-1892" from the Monthly Notices of the Royal Astronomical Society, Vol. LI, No. 9, Sup., 1891. Georgetown Observatory Collection, GRB-000010. Georgetown University Rare Books , Booth Family Center for Special Collections. https://findingaids.library.georgetown.edu/repositories/14/archival_objects/1163526 Accessed December 26, 2024.