| Title |
Non-Euclidean geometry a critical and historical study of its development. by Roberto Bonola ; Authorized English translation with additional appendices by H. S. Carslaw ; With an introd. by Federigo Enriques ; With a suppl. containing the George Bruce Halsted translations of The science of absolute space, by John Bolyai and The theory of parallels, by Nicholas Lobachevski. |