A simple non-Euclidean geometry and its physical basis
A simple non-Euclidean geometry and its physical basis: an elementary account of Galilean geometry and the Galilean principle of relativity
I. M. Yaglom; tr. from the Russian by Abe Shenitzer with the editorial assistance of Basil Gordon
Publisher: New York : Springer, c1979.
ISBN: 0387903321
Edition: (p)
Appendix
Appendix: the theory of space
János Bolyai; with introduction, comments, and addenda, edited by Ferenc Kárteszi; supplement by Barna Szénśsy
Publisher: Amsterdam : North Holland, 1987.
ISBN: 0444865284