TY  - DATA
AU  - Lefschetz, Solomon,
TI  - Topology,
T2  - Colloquium Publications, 
SN  - 9781470431617 (online)
PY  - 1930///
CY  - New York
PB  - The American mathematical society
KW  - Topology
UR  - https://doi.org/http://dx.doi.org/10.1090/coll/012
ER  -