TY  - BOOK
AU  - Rotman, Joseph J.
TI  - An Introduction to Algebraic Topology : Graduate texts in Mathematics 
SN  - 0387966781
U1  - 514.2 ROT  
PY  - 1988///
CY  - .- New York 
PB  - : Springer- verlag
KW  - Mathematics
KW  - Algebra
ER  -