TY  - JOUR
AU  - Vaughan, J. E.
TI  - Perfect Mappings and Spaces of Countable Type
JO  - Canadian journal of mathematics
PY  - 1970
SP  - 1208
EP  - 1210
VL  - 22
IS  - 6
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-138-3/
DO  - 10.4153/CJM-1970-138-3
ID  - 10_4153_CJM_1970_138_3
ER  -