TY - JOUR AU - K. Ya. Kondrat'ev AU - A. P. Galtsev AU - O. I. Smoktiy AU - E. V. Khrunov TI - Visual colour estimates of twilight sky according to observations from the spacecraft ``Soyuz-5'' JO - Doklady Akademii Nauk PY - 1970 SP - 824 EP - 825 VL - 191 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1970_191_4_a19/ LA - ru ID - DAN_1970_191_4_a19 ER -