| Institution: | (1) Laboratory for Extraterrestrial Physics NASA/Goddard Space Flight Center at Greenbelt, Greenbelt, USA;(2) Ond ejov Observatory, Czechoslovakia;(3) Paris Observatory at Meudon, Meudon, France;(4) Astronomy Group of the University of Leicester at Leicester, Leicester, England;(5) Sterrekundig Instituut Utrecht, Utrecht, The Neithelands;(6) Kapteyn Astronomical Institute at Groningen, Groningen, The Neithelands;(7) SRON Laboratory for Space Research at Utrecht, Utrecht, The Neithelands;(8) ESTEC at Noordwijk, Noordwijk, The Neithelands;(9) Department of Astronomy and Space Science, University of Florence, Italy;(10) Department of Physics of Tartu University at Tartu, Estonia;(11) Max-Planck-Institut für Kernphysik at Heidelberg, Heidelberg, Germany;(12) Sterrewacht Leiden, Leiden, The Neithelands |
