TY  - JOUR
TI  - Correction
JO  - Canadian mathematical bulletin
PY  - 1974
SP  - 429
EP  - 429
VL  - 17
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-081-1/
DO  - 10.4153/CMB-1974-081-1
ID  - 10_4153_CMB_1974_081_1
ER  -