| Affiliation: | (1) Astronomical Institute !["lsquo"]("/content/w083164533285p52/xlarge8216.gif") Anton Pannekoek!["rsquo"]("/content/w083164533285p52/xlarge8217.gif") , Amsterdam;(2) Space Research Institute (IKI), Moscow;(3) Ondrejov Observatory, Russia;(4) Sternberg Astronomical Institute, Moscow;(5) Delft, University of Technology, The Netherlands;(6) State University at Utrecht, Utrecht, The Netherlands;(7) Laboratory for Space Research, Utrecht;(8) Exxon Research and Engineering Company, Annadale, New Jersey;(9) Institute for Space Aeronomy, Bruxelles, Germany;(10) Observatory Sonnenborgh, Utrecht;(11) Museum Boerhaave, Leiden;(12) Kapteyn Laboratory, Groningen;(13) Netherlands Agency for Aerospace Programs (NIVR) Delft, The Netherlands;(14) Observatory Sonnenborg, Utrecht;(15) Ondrejov Observatory, Russia;(16) University of Technology, Delft;(17) Astrophysical Institute, Brussels;(18) Astronomical Institute, Utrecht |
