%0 Journal Article
%A Michael Barr
%T Note on a  theorem of Putnam's
%J Theory and applications of categories
%D 1997
%P .45-49
http://www
%V 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TAC_1997_3_a2/
%G en
%F TAC_1997_3_a2