TY  - GEN
AU  - Spencer, Peter Lincoln, 1893-
AU  - Brydegaard, Marguerite
TI  - Building mathematical competence in the elementary school 
U1  - 372.7 
PY  - 1966///
CY  - New York 
PB  - Holt Rinehart and Winston 
KW  - Arithmetic
KW  - Elementary education
KW  - Elementary school
KW  - Education
N1  - Includes bibliographies; 2067-11-11
ER  -