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Article / Letter to editor
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Oosterhoff, P.T.
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Raimond, E.
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Westerhout, G.
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Hulst, H.C. van de
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Laustsen, S.
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Schmidt, M.
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Oosterhoff, P.T.
1957
U Trianguli Australis, a classical Cepheid with secondary period
Article / Letter to editor
open access
Westerhout, G.
1957
The distribution of atomic hydrogen in the outer parts of the Galactic System
Article / Letter to editor
open access
Kwee, K.K.; Oosterhoff, P.T.; Volders, L.M.J.S.
1957
Photo-electric light-curves in blue and yellow light of the eclipsing variable RR Trianguli Australis
Article / Letter to editor
open access
Seeger, C.L.; Westerhout, G.
1957
Observations of two occultations of the Crab nebula by the Moon at 400 Mc/s
Article / Letter to editor
open access
Schmidt, M.
1957
The distribution of mass in M 31
Article / Letter to editor
open access
Ollongren, A.; Hulst, H.C. van de
1957
Corrections of 21-cm line profiles
Article / Letter to editor
open access
Oosterhoff, P.T.
1957
The light-variation and the radial-velocity curve of TU Cas explained in terms of a primary period and a beat period
Article / Letter to editor
open access
Raimond, E.; Volders, L.M.J.S.
1957
Preliminary observations of 21-cm emission from M 33
Article / Letter to editor
open access
Muller, C.A.; Westerhout, G.
1957
A catalogue of 21-cm line profiles
Article / Letter to editor
open access
Hulst, H.C. van de; Raimond, E.; Woerden, H. van
1957
Rotation and density distribution of the Andromeda nebula derived from observations of the 21-cm line
Article / Letter to editor
open access
Laustsen, S.
1957
Some radial velocity measurements of the Cepheid U TrA
Article / Letter to editor
open access
Laustsen, S.
1957
Three new variable stars
Article / Letter to editor
open access
Schmidt, M.
1957
Spiral structure in the inner parts of the Galactic System derived from the hydrogen emission at 21-cm wavelength
Article / Letter to editor
open access
Woltjer, L.
1957
The polarization and intensity distribution in the Crab nebula derived from plates taken with the 200-inch telescope by Dr. W. Baade
Article / Letter to editor
open access
Raimond, E.
1957
A search for atomic hydrogen in the II (ζ) Persei and the I Lacertae associations of O and B stars
Article / Letter to editor
open access
Walraven, T.
1957
Photo-electric observations of the polarization and surface brightness of the Crab nebula made at the Observations de Haute Provence
Article / Letter to editor
open access