Geometrical researches on the theory of parallels
By: by Nicholas Lobachevski ... tr. from the original by George Bruce Halsted ...
Contributors: Halsted, George Bruce, 1853-1922, tr.
Edition: New ed.
Publisher: Open Court Publishing Company
Published: 1914
Place of publication: Chicago [etc.]
Language: eng
Number of pages: 50
Subjects: Geometry, Non-Euclidean
Notes: Bibliography: p. 49-50.