TY  - DATA
AU  - Freedman, Michael H.
TI  - Surgery on codimension 2 submanifolds 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470401528 (online)
PY  - 1977///
CY  - Providence
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0191
ER  -