| Institution: | (1) The Astronomical Institute of Utrecht, UK;(2) The Astronomical Institute of Utrecht, UK;(3) Institut für Elektronik der AdW der D.D.R., Neustrelitz, Germany;(4) Dept. of Astro-Geophysics, University of Colorado, 80309, Boulder, Colo, USA;(5) University of London Observatory, UK;(6) Lunar and Planetary Unit, Environmental Science Dept., University of Lancaster, USA;(7) Institute for Theoretical Physics, University of Utrecht, UK;(8) Kapteyn Sterrenwacht, University of Groningen, UK;(9) National Physical Laboratory, New Delhi, India;(10) Vening Meinesz Laboratory, for Geophysics and Geochemistry, Utrecht, UK;(11) Herzberg Institute of Astrophysics NRCC, Ottawa, Canada |
