TY - JOUR AU - Ladislav Sehnal TI - The Earth Upper Atmosphere and the Motion of the Artificial Satellites JO - Publications of the Department of Astronomy PY - 1980 SP - 5 VL - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PDA_1980_10_a0/ LA - en ID - PDA_1980_10_a0 ER -