TY  - BOOK
AU  - Straker, Anita
TI  - Mental maths for ages 7 to 9 : teacher's book
SN  - 9780521485098
U1  - 371.3028 STR 
PY  - 1994///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Mathematics -- Study and teaching (Elementary) -- Great Britain
KW  - Mental arithmetic -- Problems, exercises, etc
ER  -