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(1 - 14 of 14)
The original values of I/α for 17 cometary orbits
Bilo, E.H.; Houten-Groeneveld, I. van 1960
The original values of I/α for 17 cometary orbits
Article / Letter to editor
open access
A new photo-electric method of classification of luminosity and spectral type for O-and B-type stars
Walraven, T.; Walraven-Terlinden, J.H. 1960
A new photo-electric method of classification of luminosity and spectral type for O-and B-type stars
Article / Letter to editor
open access
Definitive elements for comets 1905 IV (Kopff), 1941 VIII (Van Gent) 1946 I (Timmers) and 1946 VI (Jones)
Pels, G. 1960
Definitive elements for comets 1905 IV (Kopff), 1941 VIII (Van Gent) 1946 I (Timmers) and 1946 VI (Jones)
Article / Letter to editor
open access
The distortion of a magnetized cloud by differential galactic rotation
Wentzel, D.G. 1960
The distortion of a magnetized cloud by differential galactic rotation
Article / Letter to editor
open access
The sociology and culture of Africa: its nature and scope
Busia, K.A. 1960
The sociology and culture of Africa: its nature and scope
Inaugural lecture
open access
The original values of I/a for comets 1941 VIII (Van Gent) and 1946 VI (Jones)
Pels-Kluyver, H.A. 1960
The original values of I/a for comets 1941 VIII (Van Gent) and 1946 VI (Jones)
Article / Letter to editor
open access
Three-colour photometry in the UBV system of 51 northern Cepheids
Oosterhoff, P.T. 1960
Three-colour photometry in the UBV system of 51 northern Cepheids
Article / Letter to editor
open access
Note on the determination of K<SUB>z</SUB> and on the mass density near the Sun.
Oort, J.H. 1960
Note on the determination of Kz and on the mass density near the Sun
Article / Letter to editor
open access
The position of the galactic centre
Oort, J.H.; Rougoor, G.W. 1960
The position of the galactic centre
Article / Letter to editor
open access
Methods for computing the original orbits of comets
Bilo, E.H.; Hulst, H.C. van de 1960
Methods for computing the original orbits of comets
Article / Letter to editor
open access
Distribution and Motion of Interstellar Hydrogen in the Galactic System with Particular Reference to the Region within 3 Kiloparsecs of the Center
Rougoor, G.W.; Oort, J.H. 1960
Distribution and Motion of Interstellar Hydrogen in the Galactic System with Particular Reference to the Region within 3 Kiloparsecs of the Center
Article / Letter to editor
open access
Very accurate positions of selected stars
Oort, J.H. 1960
Very accurate positions of selected stars
Article / Letter to editor
open access
Internal motions and density distribution in a globular cluster
Oort, J.H.; Herk, G. van 1960
Internal motions and density distribution in a globular cluster
Article / Letter to editor
open access
The component of the galactic gravitational field perpendicular to the galactic plane, K<SUB>z</SUB>
Hill, E.R. 1960
The component of the galactic gravitational field perpendicular to the galactic plane, Kz
Article / Letter to editor
open access