TY  - BOOK
AU  - Vopenka, Petr
AU  - Hajek, Petr
TI  - THE THEORY OF SEMISETS
U1  - 511.3 
PY  - 1972///
CY  - Amsterdam
PB  - North-Holland Pub. Co.
KW  - Set Theory
N1  - Bibl. : P. 324-325
ER  -