%0 Journal Article %A Gl. S. Zhdanov %A V. N. Vertsner %T The use of ceolites to reduce hydrocarbonic contaminations in electron microscopes %J Doklady Akademii Nauk %D 1965 %P 865-867 %V 163 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_163_4_a20/ %G ru %F DAN_1965_163_4_a20