On the difference in photographic gradation for stars of different colour

Author(s):: Hertzsprung, E.

Published: 1922
Publication type: Article / Letter to editor

Date issued: 1922
Language: English
Publisher: North Holland Publishing Company
Is part of: Bulletin of the Astronomical Institutes of the Netherlands (1922), Vol. 1, p. 154
ISSN source: 0365-8910
hdl: 1887/5747