TY  - BOOK
AU  - Bonola,Roberto
AU  - Bólyai,János
AU  - Lobachevskiĭ,N.I.
TI  - Non-Euclidean geometry: a critical and historical study of its development
SN  - 0486600270
AV  - QA 685 .B66 1955
U1  - 513.8 
PY  - 1955///
CY  - New York
PB  - Dover Publications
KW  - Geometry
ER  -