TY  - BOOK
AU  - Marsh,Leonard George
TI  - Approach to mathematics: a study of groups of seven-year-old children exploring mathematical approach 
SN  - 0713611596
PY  - 1971///
CY  - London
PB  - A. & C. Black
KW  - Mathematics
KW  - Study and teaching (Elementary)
KW  - United Kingdom
ER  -