TY  - JOUR
AU  - P.J. Hilton
TI  - On the homotopy groups of unions of spaces.
JO  - Commentarii mathematici Helvetici
PY  - 1955
SP  - 59
EP  - 92
VL  - 29
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1955__29_139095/
ID  - CMH_1955__29_139095
ER  -