TY  - BOOK
AU  - Wassertheil-Smoller,Sylvia
TI  - Biostatistics and epidemiology: a primer for health and biomedical professionals 
SN  - 0387402926
PY  - 2004///
CY  - New York
PB  - Springer-Verlag
KW  - Biometry
KW  - Epidemiologic Methods
N1  - References (p. 227-231 )
ER  -