TY  - BOOK
AU  - Wells,David W.
TI  - Growth in mathematics: purple 
SN  - 0153512814
PY  - 1978///
CY  - New York
PB  - Harcourt Brace Jovanovich
KW  - Arithmetic
KW  - Study and teaching (Elementary)
KW  - Juvenile literature
N1  - Index
ER  -