%0 Journal Article %A BJARNI JÓNSSON %T On isomorphism types of groups and other algebraic systems %J Mathematica Scandinavica %D 1957 %P 224-229 %V 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1957__5_165661/ %F MS2_1957__5_165661