%0 Journal Article
%A B.P. jr. Brooks
%A W.E. Clark
%T On the categori-city of semigroup-theoretical properties.
%J Semigroup forum
%D 1971
%P 259-266
%V 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1971__3_133865/
%F SF_1971__3_133865