TY  - BOOK
AU  - Wells, David W
TI  - Growth in Mathematics
SN  - 0153512806
U1  - 510 
PY  - 1978///
CY  - New York
PB  - Harcourt Brace
KW  - Mathematics--Study and teaching (Elementary)
KW  - Arithmetic--Study and teaching (Elementary)
KW  - Arithmetic
N1  - Include Index
ER  -