TY  - BOOK
AU  - Kulczucki Stefan
AU  - Knapowski Stanislaw
TI  - Non-Euclidean geometry
U1  - 516.9 
PY  - 1961///
CY  - London
PB  - Pergamon Press
KW  - Non-Euclidean geometry
N1  - Tr from Polish
ER  -