TY  - BOOK
ED  - National Council of Teachers of Mathematics.
TI  - The Growth of mathematical ideas, grades K-12
T2  - Its Yearbook,
AV  - QA1 .N3 24th
PY  - 1959///
CY  - Washington
KW  - Mathematics
KW  - Study and teaching
N1  - Includes bibliographies
ER  -