TY  - BOOK
AU  - Comfort, W. W.
AU  - Negrepontis, S.
TI  - THE THEORY OF ULTRAFILTERS
U1  - 511.3 
PY  - 1974///
CY  - New York
PB  - Springer-Verlag
KW  - Ultrafilers -- Theory
KW  - Algebra
KW  - Topology
N1  - Bib. : P. 453-471
ER  -