TY  - BOOK
AU  - Davison, David M.
TI  - Pre-Algebra: tools for a changing world 
SN  - 9789812448620
AV  - QA 39.2 .D265 2005
U1  - HS 512 
PY  - 2005///.
PB  - PEARSON, 
KW  - Algebra
KW  - study and teaching.
ER  -