TY  - DATA
AU  - Clarke, D. A.
TI  - Hierarchies of predicates of finite types 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9780821899960 (online)
PY  - 1964///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0051
ER  -