TY  - BOOK
AU  - Patilla, Peter
TI  - Guide to good maths: Adding.
SN  - 0-7534-0155-x
AV  - TR(GS 510.7 P27 1990
PY  - 1990///
CY  - London
PB  - Kingfisher
KW  - Mathematics-Juvenile literature
ER  -