TY  - BOOK
AU  - Baeten J C M
TI  - Filters and ultrafilters over definable subsets of admissible ordinals
U1  - 511.3 
PY  - 1986///
CY  - Amsterdam
PB  - Centre for Mathematics and Computer Science; 1986
KW  - Definable subsets
KW  - Mathematical logic
ER  -