The Astronomical Institute, Utrecht
G. C. M. Reijnen
University of Southampton, Southampton
M. J. Rycroft
The Astronomical Institute, Utrecht
C. de Jager
European Space Research and Technology Centre, Noordwijk, the Netherlands
D. E. Page
Institute of Astronomy, Cambridge, UK
R. A. Lyttleton
Natuurkundig Laboratorium, Universiteit van Amsterdam, The Netherlands
H. F. Jongen
Tel-Aviv University, Tel-Aviv, Israel
Y. Ne'eman
Lick Observatory, University of California, Santa Cruz, California
G. H. Herbig
Astronomical Observatory, Ondřejov, Czechoslovakia
J. Kleczek
Planetary Science Institute, 05719, Tucson, Arizona
William K. Hartmann
Institut d'Astrophysique, Cointe-Ougrée, Belgium
L. Delbouille
Potchefstroom University, Potchefstroom, Netherlands
P. H. Stoker