%0 Journal Article %A L. L. Maksimova %T Beth properties, interpolation and amalgamation in varieties of %J Doklady Akademii Nauk %D 1991 %P 1309-1312 %V 319 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1991_319_6_a5/ %G ru %F DAN_1991_319_6_a5