TY  - BOOK
AU  -  Fletcher Robert H., Fletcher Suzanne W., Wagner Edward H.
TI  - Clinical epidemiology: the essentials
SN  - 0683032526
U1  - WA105 
PY  - 1982///
CY  - Baltimore
PB  - Williams and Wilkins
KW  - Epidemology
N2  -  Epidemology
ER  -