%0 Journal Article
%A A.H. Clifford
%T Lectures in semigroups, by M. Petrich.
%J Semigroup forum
%D 1978
%P 379-384
%V 16
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1978__16_134295/
%F SF_1978__16_134295