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Schoenmaker, A.A.
1969
A new variable star in Aquarius (Note)
Article / Letter to editor
open access
Wisse-Schouten, M.; Wisse, P.N.J.
1969
On the maximum of SZ Lyncis (Note)
Article / Letter to editor
open access
Genderen, A.M. van
1969
Five-colour photometry of 12 cepheids in the Small Magellanic Cloud
Article / Letter to editor
open access
Rijf, R.; Tinbergen, J.; Walraven, T.
1969
Auxiliary equipment of an astronomical photometer
Article / Letter to editor
open access
Laan, H. van der
1969
Frequency selection, spectral-index distributions and source counts
Article / Letter to editor
open access
Kwee, K.K.
1968
Photo-electric observations of the short-period eclipsing binary W Ursae Majoris made on 20 March 1957 (Abstract)
Article / Letter to editor
open access
Cugnon, P.
1968
A neutral-hydrogen feature at lII = -11°, bII = +3°
Article / Letter to editor
open access
Okuda, H.
1968
The spectrum of the galactic radio emission derived from the observed spectrum of cosmicray electrons
Article / Letter to editor
open access
Herk, G. van
1968
Note on some systematic differences between different systems of proper motions, with emphasis on the influence of the magnitude
Article / Letter to editor
open access
Okuda, H.; Tanaka, Y.
1968
The galactic magnetic field derived from cosmic-ray electrons
Article / Letter to editor
open access
Kwee, K.K.; Braun, L.D.
1968
Investigations on population II Cepheids. I. New photoelectric observations
Article / Letter to editor
open access
Bueren, H.G. van; Oort, J.H.
1968
On the possibility of amplification of 21-cm radio emission in high-velocity clouds (Errata: 20 224)
Article / Letter to editor
open access
Kepner, M.E.
1968
A programme for determining distance information for the high-velocity clouds
Article / Letter to editor
open access
Kwee, K.K.
1968
Photo-electric observations of the short-period eclipsing binary V 502 Ophiuchi made in 1955 and 1956 (Abstract)
Article / Letter to editor
open access
Fomalont, E.B.
1968
A two-component log N-log S relationship
Article / Letter to editor
open access
Kwee, K.K.
1968
Investigation on population II Cepheids. II. Epochs and periods
Article / Letter to editor
open access
Kwee, K.K.
1968
Investigations on Population II Cepheids.IV. Colours and luminosities
Article / Letter to editor
open access
Hulst, H.C. van de
1968
Radiative transfer in thick atmospheres with an arbitrary scattering function
Article / Letter to editor
open access
Wamsteker, W.
1968
Photo-electric observations of RU Cam in the years 1966-1968
Article / Letter to editor
open access
Kwee, K.K.; Wisse, P.N.J.
1968
Note on the position of HW Normae
Article / Letter to editor
open access
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