TY  - BOOK
AU  - Stillwell, John
AU  - 
TI  - four pillars of geometry
SN  - 0387255303
U1  - 514 
PY  - 2005///
CY  - New York
PB  - Springer
KW  - Geometry
KW  - euclidean geometry
KW  - Non-Euclidean geometry
KW  - Euclidean spaces
ER  -