%0 Journal Article %A A. I. Kondrashov %A N. N. Petrov %T The energy spectrum of electron emission by a single $\mathrm{KCl}$ crystal bombarded by helium ions %J Doklady Akademii Nauk %D 1967 %P 67-69 %V 173 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_173_1_a17/ %G ru %F DAN_1967_173_1_a17