%0 Journal Article %A JENNIFER WALLIS %T A Note on Supplementary Difference Sets (Short Communication) %J Aequationes mathematicae %D 1973 %P 306-306 %V 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1973__9_182365/ %F AM2_1973__9_182365