Tel-Aviv University, The Netherlands
G. Shaviv
The Astronomical Institute, Utrecht
C. de Jager
Astrophysical Instiute, Free University, Brussels, Belgium
C. de Loore
Astronomisches Rechen-Institut, Heidelberg
W. Fricke
Astronomical Institute, Czechoslovak Academy of Sciences, Ondřejov
J. Kleczek
Dept. of Applied Physics, Eindhoven University of Technology, The Netherlands
R. J. C. van Zolingen
Tata Institute of Fundamental Research, 400 005, Bombay, India
M. S. Vardya
Kiepenheuer-Institute for Solar Physics, Freiburg, FRG
H. Wöhl
Tel-Aviv University, Ramat-Aviv
G. Tauber
Astronomical Institute, University of Amsterdam, The Netherlands
T. de Jong
Astronomical Institute, Utrecht
W. de Graaff