%0 Journal Article
%A G.B. Preston
%T Clifford, A.H. - An appreciation of his his work on the occasion of his sixty-fifth birthday.
%J Semigroup forum
%D 1974
%P 32-57
%V 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1974__7_134000/
%F SF_1974__7_134000