TY  - BOOK
ED  - National Council of Teachers of Mathematics.
TI  - Matemática moderna para profesores de enseñanza elemental
T2  - Aula XXI
SN  - 8429413316
AV  - QA248.3 .N2918
U1  - 372.7 
PY  - 1976///
CY  - Madrid
PB  - Santillana
KW  - Arithmetic
KW  - Foundations
KW  - Local
KW  - Mathematics
KW  - Study and teaching (Elementary)
N1  - Translation of : Mathematics for elementary school teachers
ER  -