TY  - BOOK
AU  - Piggott, Jennifer
AU  - Pumfrey, Liz
TI  - Maths trails - Visualising
SN  - 9780521700429
U1  - 372.70440941 PIG 
PY  - 2007///
CY  - Cambridge UK
PB  - [publisher not identified]
KW  - Problem solving--Study and teaching (Elementary)--Activity programs
KW  - Problem solving--Study and teaching (Elementary)--Activity programs, Great Britain
ER  -