TY  - BOOK
AU  - Halmos,Paul R.
TI  - Naive set theory
T2  - Undergrauate texs in mathematics
SN  - 0387900926
U1  - 519.2 
PY  - 1974///
CY  - New York
PB  - Springer
KW  - TEORIA DE CONJUNTOS
ER  -