Non-Euclidean geometry.
Coxeter, H. S. M.
Non-Euclidean geometry. - Toronto, University of Toronto Press, 1978. - xv,309 p. illus. - Mathematical expositions No.2 .
Non-Euclidean geometry
514.13 / COX
Non-Euclidean geometry. - Toronto, University of Toronto Press, 1978. - xv,309 p. illus. - Mathematical expositions No.2 .
Non-Euclidean geometry
514.13 / COX