Report of the Director of the Observatory at Leiden for the period from May 1 1919 to August 31 1921

Author(s):: Sitter, W. de

Published: 1921
Publication type: Article / Letter to editor

Date issued: 1921
Language: English
Publisher: North Holland Publishing Company
Is part of: Bulletin of the Astronomical Institutes of the Netherlands (1921), Vol. 1, p. 5-12
ISSN source: 0365-8910
hdl: 1887/6204