Astronomical Institute, Ondrenov
J. Kleczek
Institute of Astronomy, Zürich
H. Nussbaumer
The Astronomical Institute at Utrecht, Utrecht, Germany
K. A. van der Hucht, R. J. Rutten, C. de Jager, O. Namba, M. Kuperus, J. Schrijver & W. de Graaff
Astrophysical Institute, Brussels
J. P. de Greve
Dept. for Mechanical Engineering, Technological University, Delft
G. Ooms
Leiden Observatory, Leiden, Netherlands
H. van der Laan & w. Bijleveld
Heinrich-Hertz-Institute for Sola-Terrestrial Physics, Postdam
F. W. Jäger
Faculty of Law, Utrecht University, Utrecht, Germany
G. C. M. Reijnen
F.O.M. Institute for Atomic and Molecular Physics, Amsterdam, Netherlands
J. Kistemaker
Astronomical Council of the Academy of Sciences of the U.S.S.R., Moscow
E. R. Mustel
Tel Aviv University, Tel Aviv, UK
Y. Ne'eman
Dept. of Applied Mathematics of the University, St. Andrews
E. R. Priest
Academy of Sciences of the GDR at Potsdam, Potsdam, Germany
H. Stiller & W. Seifert
Space Research Laboratory at Utrecht, Utrecht, Germany
Roel Hoekstra & J. Schrijver
Eindhoven, The Netherlands
F. L. H. M. Stumpers
Central Geophysical Institute, Potsdam, Germany
H. Stiller & S. Frank
Netherlands Institute for Sea Research, Texel
J. T. F. Zimmerman
Astrophysical Institute of the Free University, Brussels
C. de Loore
Research Center for the Physics of the Terrestrial and Planetary Environment, CNET, at Issy-les-Moudbeaux, Issy-les-Moudbeaux, Germany
Gendrin R. & K. A. Pounds
University of Leicester, Leicester
P. S. Mulder
American Society for Cell Biology, Bethesda
R. S. Young
Astrophysical Institute of the University, Liège
L. Houziaux
University of Oslo, Oslo
O. Engvold
University of Arizona, Tucson
B. J. Bok