TY  - BOOK
AU  - Lipschutz, Seymour
TI  - Theory and problems of set theory 
SN  - 0-07-099013-1
U1  - 511.322 
PY  - 1981///
CY  - Singapore
PB  - Mc Graw Hill
KW  - Set theory
KW  - Mathematics
ER  -