TY  - JOUR
AU  - John R. Harper
TI  - Stable Secondary Cohomology Operations.
JO  - Commentarii mathematici Helvetici
PY  - 1969
SP  - 341
EP  - 353
VL  - 44
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1969__44_139404/
ID  - CMH_1969__44_139404
ER  -