TY  - BOOK
AU  - Letchford,Stanley
TI  - Business mathematics and statistics
T2  - Cassell professional handbook
SN  - 0304297607
U1  - 510 LET 
PY  - 1977///].
CY  - London: 
PB  - Cassell, 
KW  - Mathematics
KW  - Statistics
N1  - With answers; Includes index
ER  -