Dept. for Mechanical Engineering, Technological University, Delft, Netherlands
O. Ooms
Space Research Laboratory, Utrecht, Netherlands
Hans Van Der Woerd
Space Research Laboratory, Asotronomical Institute, Utrecht, Netherlands
Henny J. G. L. M. Lamers
Astronomical Institute, Oncrřejov, Czechoslovakia
Josip Kleczek
Research Center for Geodynamics and Astronomy, Grasse, France
J. Kovalevsky
Kapteyn Laboratory of the University, Groningen, Netherlands
R. Gathier
The Astronomical Institute, Wrocław, Poland
T. Jarzebowski
Astrophysical Institute, University of Liège, Belgium
J. P. Swings
The Astronomical Institute, Utrecht, Netherlands
K. A. van der Hucht
‘Sonnenborgh’ Observatory, The Astronomical Institute, Utrecht, Netherlands
O. Namba
Space Research Laboratory, The Astronomical Institute, Utrecht
R. Mewe
Institute of Astronomy, Cambridge, U.K.
D. Lynden-Bell
Astronomical Institute, Utrecht, Netherlands
Jan Kuijpers
Astronomical Institute ‘Anton Pannekoek’, Amsterdam, Netherlands
M. van der Klis
Netherlands Agency for Aerospace Programs, Delft, Netherlands
D. de Hoop
Delft Technical University, The Netherlands
H. Wittenberg
Institute of Astronomy, Torun, Netherlands
W. Iwanowska
Astronomical Institute, University of Amsterdam, Netherlands
P. S. Thé
Astronomical Institute, Utrecht, Netherlands
J. Schrijver
Kapteyn Laboratory of the University, Groningen, Netherlands
S. R. Pottasch