TY  - BOOK
AU  - Blair, John T.
AU  - Carpy, James.
AU  - Clark, Jan K.
TI  - Primary mathematics: A development through activity
SN  - 0435028243
U1  - 510 BLA 
PY  - 1987///
CY  - London, Singapore
PB  - Heinemann educational books
ER  -