TY  - BOOK
ED  - National Council of Teachers of Mathematics (Estados Unidos)
TI  - Sets
T2  - Topics in mathematics for elementary school teachers
AV  - QA248 S46
PY  - 1964///
CY  - Washington, D.C.
PB  - National Council of Teachers of Mathematics
KW  - Teoría de conjuntos
KW  - Estudio y enseñanza
ER  -