Lobachevskian Geometry
Smogorzhevsky, A. S.,
Lobachevskian Geometry A. S. Smogorzhevsky - Moscow : MIR Publishers, c1976. - 71 p.: ill.;
516 / SMO/LOB
Lobachevskian Geometry A. S. Smogorzhevsky - Moscow : MIR Publishers, c1976. - 71 p.: ill.;
516 / SMO/LOB