TY  - BOOK
AU  - Siegel, Sidney
AU  - Castellan
TI  - Nonparamatric statistics: for the behavioural science 
U1  - 519.5 
PY  - 1988///
CY  - New York
PB  - Mc Graw Hill book company
KW  - Psychology
N2  - 19954
ER  -