TY  - BOOK
AU  - Viro, O.Ya & others,
TI  - Elementary Topology: Problem Textbook 
SN  - 9780821887264
U1  - 514 
PY  - 2012///
CY  - New York
PB  - American Mathematical Society
KW  - Topology
KW  - Mathematics
KW  - Elementary Topology
KW  - G- Mathematics
ER  -