TY  - BOOK
AU  - Letchford,S.
TI  - Business mathematics and statistics
SN  - 0304297607
PY  - 1977///
CY  - London
PB  - Cassell
KW  - Mathematical statistics
KW  - Business mathematics
N1  - 'A Cassell professional handbook' - cover. - With answers; Index
ER  -