Biblio
] . 1898. “The First Satellite Of Jupiter”. Abdruck Aus Den Astr. Nachr. Bd. 146.. Abdruck Aus Den Astr. Nachr. Bd. 146.
Douglas, AE_The First Satellite of Jupiter_1898.pdf (15.82 MB). 1898. “Present Rotation Period Of The First Satellite Of Jupiter And Its Change In Form And Period Since 1892”. The Astronomical Journal (No. 441). The Astronomical Journal.
Douglas, AE_Present Rotation Period of the First Satellite of Jupiter and its Change in Form and Period Since 1892_1898.pdf (3.57 MB). 1897. “Drawings Of Jupiter's Third Satellite”. Abdruck Aus Den Astr. Nachr. Bd. 143. Abdruck Aus Den Astr. Nachr. Bd. 143.
Douglas, AE_Drawings of Jupiters Third Satellite_1897.pdf (3.44 MB)