TY  - JOUR
AU  - N.E. Steenrod
TI  - Cohomology Operations Derived from the Symmetric Group.
JO  - Commentarii mathematici Helvetici
PY  - 1956
SP  - 195
EP  - 218
VL  - 31
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1956__31_139141/
ID  - CMH_1956__31_139141
ER  -