TY  - DATA
AU  - Schon, Rolf
TI  - Effective algebraic topology 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470408770 (online)
PY  - 1991///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0451
ER  -