TY  - GEN
AU  - Sigler,L.E
TI  - Exercises in set theory
SN  - 0387901930
U1  - 511/.3 
PY  - 1976///, c1966
CY  - New York
PB  - Springer-Verlag
KW  - Set theory
KW  - Problems, exercises, etc
N1  - Contine bibliografie
ER  -