Ephemeride des periodischen Kometen Winnecke für die Erscheinung 1909.Published in:Astronomische Nachrichten, 1909, v. 182, n. 16, p. 271, doi. 10.1002/asna.19091821603By:Hillebrand, C.Publication type:Article
Observations of double stars.Published in:Astronomische Nachrichten, 1909, v. 182, n. 16, p. 253, doi. 10.1002/asna.19091821602By:Olivier, Charles P.;Wilson, Ralph E.;Newton, W.Publication type:Article
Masthead.Published in:Astronomische Nachrichten, 1909, v. 182, n. 16, p. fmi, doi. 10.1002/asna.19091821601Publication type:Article