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Article / Letter to editor
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1930
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Sitter, A. de
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Sitter, A. de
1947
A study of the variable stars in Messier 4 (prepared for publication by P. Th. Oosterhoff)
Article / Letter to editor
open access
Sitter, A. de
1937
Photovisual magnitudes of stars brighter than 8m.0, north of + 80°
Article / Letter to editor
open access
Sitter, A. de
1933
The variation of the period of RZ Cassiopoeiae (Errata: 10 146)
Article / Letter to editor
open access
Sitter, A. de
1932
Photographic photometry of RR Lyrae on plates taken by J. Schilt H. van Gent and
Article / Letter to editor
open access
Sitter, A. de
1931
Photographic magnitudes of bright stars near the North Pole (Errata: 6 224)
Article / Letter to editor
open access
Sitter, A. de
1930
Photographic magnitudes of stars brighter than 7m.5 between declination +80° and the pole (Errata: 6 224)
Article / Letter to editor
open access
Sitter, A. de
1930
A comparison of the angular dimensions of the globular clusters M 3 and M 13
Article / Letter to editor
open access
Sitter, A. de
1928
Measures of the magnitude of α Ursae Minoris on plates taken mainly by N. W. Doorn, with the ""moving camera"" (Errata: 4 V, 6 140)
Article / Letter to editor
open access
