The Astronomical Institute, Utrecht
C. de Jager
Astronomical Institute, Ondrejov
L. Sehnal
Ondřejov Observatory, Czechoslovakia
Josip Kleczek
Charles University, Prague
V. Vanysek
Imperial College, London
J. J. Quenby
Space Research Department, University of Groningen, The Netherlands
R. J. van Duinen
Astronomical Institute, Utrecht
R. H. van Gent & J. S. Kaastra
National Center of Scientific Research, Falicon, France
G. Ringeard
Space Research Laboratory, The Astronomical Institute, Utrecht
R. Mewe
Academy of Sciecnes of the GDR, Potsdam
H. Stiller & R. Wäsch
ESTEC, Noordwijk
K. -P. Wenzel
HYdraulics Laboratory, Delft
A. Vrijer
Astronomical Institute, Ondřejov
Z. Ceplecha
Astrophysical Institute, Brussels
P. Hellings
Institute of Astrophysics, Cointe-Ougrée
L. Houziaux