TY  - BOOK
AU  - Ehrenberg, A. S. C.
TI  - Data reduction :  Analysing and interpreting statis   
SN  - 0471233994
PY  - 1975///
CY  - London
PB  - Wiley          
KW  - Statistics
KW  - Mathematics
N1  - Bibliography : p377-80
ER  -