| Institution: | (1) The Astronomical Institute at Utrecht, The Netherlands;(2) Tel-Aviv University, Israel;(3) Institute for Theoretical Physics, University of Utrecht, The Netherlands;(4) Astronomical Observatory, Ond jov, Czechoslovakia;(5) Institute for History of Science, Polish Academy of Sciences, Warsaw;(6) Max-Planck-Institut für Aeronomie, Lindau;(7) Air Force Geophysics Laboratory, Mass., USA;(8) International Institute for Aerial Survey and Earth Sciences, Enschede, The Netherlands;(9) The Astronomical Institute at Utrecht, The Netherlands;(10) Institute for Theoretical Physics, University of Utrecht, The Netherlands;(11) Physics Laboratory, University of Utrecht, The Netherlands;(12) Royal Netherlands Meteorological Institute, The Netherlands;(13) Astronomical Institute, University of Amsterdam, The Netherlands;(14) The Astronomical Institute at Utrecht, The Netherlands;(15) Physical Laboratory, University of Utrecht, The Netherlands |
