TY  - BOOK
ED  -  The National  Council of Teachers.
TI  -  The growth of mathematical ideas, grades K-12
U1  -  510 
PY  - 1959///
CY  -  Washington : 
PB  -  The National Council of Teachers, 
KW  -  Mathematics
KW  -  Study and teaching
N1  -  Includes bibliographical references
ER  -