TY  - BOOK
AU  - SUMNER (W L)
TI  - Teaching of arithmatic and elementary mathematics
U1  - 370/83 
PY  - 1946///
CY  - Oxford
PB  - Basil Blackwell
KW  - Teaching
KW  - of
KW  - mathematics
KW  - elementary
KW  - arithmatic
KW  - and
ER  -