TY  - BOOK
AU  - Thirkettle, G. L.
TI  - Wheldon's business statistics and statistical method # Wheldons business statistics and statistical method
SN  - 0 7121 0229 9
U1  - 310:650 
PY  - 1936/// # 1974
CY  - London
PB  - MacDonald & Evans Limited
ER  -