TY  - BOOK
AU  - Bloom,Marjorie W.
AU  - Galton,Grace K.
ED  - Cuisenaire Company of America
TI  - Estimate calculate evaluate: calculator activities for the middle grades 
SN  - 0938587129
U1  - 510.78 23
PY  - 1990///].
CY  - [New York]: 
PB  - [Cuisenaire Company], 
KW  - Mathematics
KW  - Teaching aids
ER  -