TY  - BOOK
AU  - DeVault, M. Vere
TI  - Improving mathematics programs: Trends and issues in the elementary school 
AV  - QA 135 Imp 
PY  - 1961///
CY  - Columbus
PB  - Charles E. Merrill Books
KW  - Oclc
KW  - Mathematics-study teaching
N1  - Includes an index
ER  -