TY  - BOOK
AU  - Alexandroff, Paul.
TI  - Elementary concepts of topology
SN  - 048660747-X
U1  - 514 
PY  - 1961///
CY  - New York: 
PB  - Dover Publications Inc., 
KW  - Mappings
KW  - Math
KW  - Polyhedra
KW  - Topological space
ER  -