TY  - BOOK
AU  - Harper, W. M.
TI  - Statistics 
SN  - 0712118993
U1  - 519 HAR 
PY  - 1991///
CY  - London
PB  - Pitman
KW  - Frequency distributions
KW  - Probability
KW  - Data collection
N1  - Includes index
ER  -