%0 Journal Article
%A N.E. Steenrod
%T Cohomology Operations Derived from the Symmetric Group.
%J Commentarii mathematici Helvetici
%D 1956
%P 195-218
%V 31
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1956__31_139141/
%F CMH_1956__31_139141