TY  - BOOK
AU  - Walker Kevin
TI  - Extension of Casson's invariant
SN  - 978-0-691-02532-2
U1  - 514.3 
PY  - 1992///
CY  - Princeton
PB  - PUP
KW  - Invariants
KW  - Three-manifolds (Topology)
ER  -