%0 Journal Article %A K.D. jr. Magill %A P.R. Misra %A U.B. Tewari %T Unifying congruences on S(I). %J Semigroup forum %D 1980 %P 361-372 %V 21 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1980__21_134458/ %F SF_1980__21_134458