TY  - BOOK
AU  - Bonola, Roberto
TI  - Non-euclidean geometry; a critical and historical study of its development
U1  - 516 
PY  - 1955///
CY  - New York
PB  - Dover
N1  - English Translation with additional appendices by H. S. Carslaw with an introduction by Federigo Enriques
ER  -