TY  - JOUR
AU  - W. Woolsey Johnson
TI  - A Case of Non-Euclidian Geometry.
JO  - Bulletin of the New York Mathematical Society
PY  - 1893
SP  - 158
EP  - 161
VL  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/BNYMS_1893__2_186503/
ID  - BNYMS_1893__2_186503
ER  -