The Online Books Page

Books by Willem de Sitter:

Books in the extended shelves:

• Sitter, Willem de: Annalen van de Sterrewacht te Leiden (Gedrukt bij J. Enschedé en zonen, 1913), also by Sterrewacht Leiden (page images at HathiTrust)
• Sitter, Willem de: The astronomical aspect of the theory of relativity. (University of California press, 1933) (page images at HathiTrust)
• Sitter, Willem de: Discussion of heliometer observations of Jupiter's satellites, made by Sir David Gill and W.H. Finlay. (J.B. Wolters, 1901), also by William Henry Finlay and David Gill (page images at HathiTrust)
• Sitter, Willem de: Inleiding tot de methode der kleinste kwadraten, naar het kollege gegeven aan de Universiteit te Leiden (E.J. Brill, 1914) (page images at HathiTrust)
• Sitter, Willem de: KOSMOS (CAMB, MA, 1932) (page images at HathiTrust)

Find more by Willem de Sitter at your library, or elsewhere.