Elementry concepts of topology
By: by Paul Alexandroff; with a preface by David Hilbert;  Translatted by Alan E. Farley.
Contributors: Hilbert, David, 1862-1943.; Farley, Alan E.; Alexandroff, Paul.
Publisher: Dover Publications
Published: 1961
Place of publication: New York
Number of pages: 57
Subjects: Topology