Ringmikrometerbeobachtungen von Kleinen Planeten.Published in:Astronomische Nachrichten, 1930, v. 238, n. 6, p. 81, doi. 10.1002/asna.19302380602By:Luther, W.Publication type:Article
Masthead.Published in:Astronomische Nachrichten, 1930, v. 238, n. 6, p. fmi, doi. 10.1002/asna.19302380601Publication type:Article
Perturbations of the planet 659 Nestor by Mercury, Venus, the Earth and Mars.Published in:Astronomische Nachrichten, 1930, v. 238, n. 6, p. 91, doi. 10.1002/asna.19302380603By:Mikhalsky, N.Publication type:Article