TY  - BOOK
AU  - Har, Yeap B.
TI  - Bar modeling: a problem-solving tool / 
AV  - QA 14.S55 .H254 2010
U1  - TR 511  
PY  - 2010///.
CY  - Singapore : 
PB  - Marshall Cavendish, 
KW  - Graphic methods
N1  - Faculty
ER  -