TY  - BOOK
AU  - Wheeler,  Harold 
AU  -  Dunbar, F.L.
TI  - The book of facts
SN  - 9781921023439 (pbk.) :
U1  - 909 BOO 
PY  - 2007///
CY  - [Kedron, Qld.]
PB  - Origo Education
KW  - Addition
KW  - Study and teaching
KW  - Problems, exercises, etc
N1  - "A comprehensive guide for teaching addition facts"
ER  -