TY  - BOOK
AU  - Biggs,J.B.
TI  - Mathematics and the conditions of learning : a study of arithmetic in the primary school 
U1  - 372.3 
PY  - 1967///.
CY  - England : 
PB  - National Foundation for Educational Research in England, 
KW  - Elementary education
KW  - Arithmetic--Study and teaching (Primary)
N1  - Includes index.
ER  -