TY  - GEN
AU  - John Mc Nally
AU  - William Murray 
AU  - Kenneth Inns
TI  - Understanding Numbers
SN  - 0721400396
PY  - 1966///
CY  - UK
PB  - Ladybird Books (Wills & Hepworth Ltd)
KW  - English
KW  - General
ER  -