Astronomical Institute, Utrecht
H. Nieuwenhuijzen
Observatory, Leiden
F. P. Israel
Netherlands Foundation for Research in Astronomy, Dwingeloo
C. Slottje
SRON Laboratory for Space Research, Groningen
L. B. F. M. Waters
Astronomical Institute, Ondřejov
J. Kleczek
Institute of Theoretical Physics and Observaory of the University, Kiel
K. Werner
ESA IUE Observatory, Madrid
M. Barylak
South African Astronomical Observatory, Cape Town
Patricia Whitelock
Astronomical Institute, Bratislava
Ľ Kresák
Geneva Observatory, Sauverny
G. Meynet
SRON Space Research, Utrecht
K. A. van der Hucht
Rutherford Appleton Laboratory, Chilton, Didcot
D. Stickland