Non-Euclidean geometry; a critical and historical study of its development. 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.
Non-Euclidean geometry; a critical and historical study of its development. 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.