Space, number, and geometry from Helmholtz to Cassirer / by Biagioli, Francesca

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Non-Euclidean Geometry : Fifth Edition / by Coxeter, H. S. M. 1907-

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Noneuclidean tesselations and their groups. by Magnus, Wilhelm, 1907-1990

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Projective geometry and projective metrics / by Busemann, Herbert, 1905-1994, Kelly, Paul J., 1915-1995

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Appendix, the theory of space / by Bolyai, János, 1802-1860

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Geometrical researches on the theory of parallels, by Lobachevskiĭ, N. I. 1792-1856

Non-Euclidean geometry. by Coxeter, H. S. M. 1907-2003

Geometry and the imagination, by Hilbert, David, 1862-1943

Noneuclidean geometry. by Meschkowski, Herbert

An introduction to non-Euclidean geometry. by Gans, David

Noneuclidean tesselations and their groups. by Magnus, Wilhelm, 1907-

Thomas Reid's Inquiry: the geometry of visibles and the case for realism. by Daniels, Norman, 1942-

Euclidean and non-Euclidean geometries; development and history by Greenberg, Marvin J.

The elements of non-Euclidean geometry. by Sommerville, Duncan M'Laren Young, 1879-1934

Non-Euclidean geometry, by Manning, Henry Parker, 1859-

Non-Euclidean geometry. by Coxeter, H. S. M. 1907-2003

Four-dimensional geometry : an introduction / by Hess, Adrien L.

Deductive systems : finite and non-Euclidean geometries / by Runion, Garth E.

A simple non-Euclidean geometry and its physical basis : an elementary account of Galilean geometry and the Galilean principle of relativity / by I︠A︡glom, I. M. 1921-

Girolamo Saccheri's Euclides vindicatus / by Saccheri, Girolamo, 1667-1733