%0 Journal Article %A V. G. Istomin %T Magnesium and calcium ions in the upper atmosphere of the Earth %J Doklady Akademii Nauk %D 1961 %P 1066-1068 %V 136 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_136_5_a15/ %G ru %F DAN_1961_136_5_a15