TY  - BOOK
ED  - National Council of Teachers of Mathematics.
TI  - Logica
T2  - Temas de matematicas, cuaderno 12
SN  - 968-24-0233-6
AV  - QA9 .A5 N38
PY  - 1970///
CY  - Mexico
PB  - Trillas
ER  -