TY  - JOUR
AU  - Douglas C. Ravenel
TI  - A Definition of Exotic Characteristic Classes of Spherical Fibrations
JO  - Commentarii mathematici Helvetici
PY  - 1972
SP  - 421
EP  - 436
VL  - 47
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1972__47_139524/
ID  - CMH_1972__47_139524
ER  -