TY  - BOOK
AU  - Woodward,M.(Mark).
TI  - Epidemiology: study design and data analysis 
T2  - Texts in statistical science
SN  - 1-58488-009-0
AV  - RA652.2 .M3 W66
PY  - 1999///
CY  - Boca Raton, Fla.
PB  - Chapman and Hall
N1  - Incluye bibliografia
ER  -