TY  - DATA
AU  - Irving, Ronald S.
TI  - A filtered category OS and applications 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470408428 (online)
PY  - 1990///
CY  - Providence, R.I., USA
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0419
ER  -