TY  - DATA
AU  - Viro, O. IA.
TI  - Elementary topology: problem textbook 
T2  - Miscellaneous Books, 
SN  - 9781470412012 (online)
PY  - 2008///
CY  - Providence, R.I.
PB  - American Mathematical Society
KW  - Topology
N1  - Includes bibliographical references (p. 393) and index
UR  - https://doi.org/10.1090/mbk/054
ER  -