TY  - BOOK
AU  - Buckingham,Burdette Ross
TI  - Elementary arithmetic: its meaning and practice
AV  - QA9 .B845
U1  - 511 
PY  - 1947///]
CY  - Boston
PB  - Ginn
KW  - Number concept
KW  - Local
KW  - Arithmetic
KW  - Foundations
ER  -