Astronomical Institute ‘Anton Pannekoek’, Amsterdam
P. S. Thé
Space Research Institute (IKI), Moscow
L. Matveyenko
Ondrejov Observatory, Russia
J. Kleczek
Sternberg Astronomical Institute, Moscow
L. M. Gindilis & G. M. Rudnitskij
Delft, University of Technology, The Netherlands
J. Arbocz, J. Schuve & J. A. Steketee
State University at Utrecht, Utrecht, The Netherlands
W. de Graaff
Laboratory for Space Research, Utrecht
K. A. van der Hucht
Exxon Research and Engineering Company, Annadale, New Jersey
Wayne G. Roberge
Institute for Space Aeronomy, Bruxelles, Germany
G. Kockarts
Observatory ‘Sonnenborgh’, Utrecht
R. H. van Gent
Museum Boerhaave, Leiden
E. Dekker
Kapteyn Laboratory, Groningen
T. S. van Albada
Netherlands Agency for Aerospace Programs (NIVR) Delft, The Netherlands
D. de Hoop
Observatory ‘Sonnenborg’, Utrecht
H. Nieuwenhuijzen
Ondrejov Observatory, Russia
Josip Kleczek
University of Technology, Delft
J. L. van Ingen
Astrophysical Institute, Brussels
P. Hellings
Astronomical Institute, Utrecht
A. Achterberg