The elements of non-Euclidean geometry
Sommerville, D M Y
The elements of non-Euclidean geometry - New York Dover Publications 1958 - xvi, 274 p. 20 cm.
Roman
Hyperbolic geometry
Non-Euclidean geometry
513.8
The elements of non-Euclidean geometry - New York Dover Publications 1958 - xvi, 274 p. 20 cm.
Roman
Hyperbolic geometry
Non-Euclidean geometry
513.8