TY  - BOOK
AU  - 
TI  - Epidemiology : study design and data analysis
SN  - 9781439839706
AV  - RA  652.2.W6 2014 
PY  - 2014///
CY  - Boca Raton
PB  - CRC Press, 
KW  -  Epidemiology
KW  - Statistical methods
N1  - Includes bibliographical references and index
ER  -