| Affiliation: | (1) Astronomical Institute at Utrecht, Utrecht, The Netherlands;(2) Lund Observatory, Sweden;(3) Observatoire de Paris-Meudon, Paris, France;(4) International Academy of Astronautics at Paris, Paris, France;(5) Wilhelm Foerster Observatory at Berlin, Berlin, Germany;(6) Astronomical Council, Moscow;(7) Free University, Amsterdam;(8) M.V. Keldysh Institute of Applied Mathematics at Moscow, Moscow, USSR;(9) Royal Greenwood Observatory at Hailsham, UK;(10) Main Astronomical Observatory at Kiev, Kiev, USSR |
