Die Ellipsoidhypothese in den Spezialbewegungen der Fixsterne.Published in:Astronomische Nachrichten, 1920, v. 210, n. 15, p. 249, doi. 10.1002/asna.19202101502By:Lense, J.Publication type:Article
Masthead.Published in:Astronomische Nachrichten, 1920, v. 210, n. 15, p. fmi, doi. 10.1002/asna.19202101501Publication type:Article
Meteor.Published in:Astronomische Nachrichten, 1920, v. 210, n. 15, p. 263, doi. 10.1002/asna.19202101503By:Graff, K.Publication type:Article