Tri sochinenii︠a︡ po geometrii
Subtitle: Geometrii︠a︡. Geometricheskie issledovanii︠a︡ po teorii palallelʹnykh liniĭ.  Pangeometrii︠a︡
By: N.I. Lobachevskiĭ ; vstup. statʹi︠a︡ A.P. Nordena ; primechanii︠a︡ V.F. Kagana.
Series: Klassiki estestvoznanii︠a︡: Matematika, mekhanika, fizika, astronomii︠a︡
Publisher: Gos. izd-vo tekhniko-teoret. lit-ry
Published: 1956
Place of publication: Moskva
Language: rus
Number of pages: 415
Subjects: Geometry, Non-Euclidean
Notes: "K stoletii︠u︡ so dni︠a︡ smerti Lobachevskogo."

Includes bibliographical references.