TY  - JOUR
AU  - Harold Bell
TI  - Some topological extensions of plane geometry
JO  - Revista colombiana de matematicas
PY  - 1975
SP  - 125
EP  - 154
VL  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RCM_1975__9_181639/
ID  - RCM_1975__9_181639
ER  -