%0 Journal Article %A Fredrik L. Smith %T A Note on the Covering Groups of ...n, n ... 6. %J Mathematische Zeitschrift %D 1972 %P 64-66 %V 124 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1972__124_171656/ %F MZ_1972__124_171656