%0 Journal Article %A Yu. I. Merzlyakov %T Fourth All-Union Symposium on Group Theory %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1973 %V 28 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1973_28_3_a27/ %G ru %F RM_1973_28_3_a27