%0 Journal Article %A A. D. Danilov %A V. K. Semenov %T A second experiment in the direct study of the ionosphere for ion-molecular reaction constants %J Doklady Akademii Nauk %D 1968 %P 326-328 %V 183 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1968_183_2_a20/ %G ru %F DAN_1968_183_2_a20