TY  - BOOK
AU  - Fletcher, Robert H. 
AU  - Fletcher,Suzanne W.
TI  - Clinical epidemiology: the essentials 
SN  - 0781752159
AV  - RA652 .C45 2006
PY  - 2005///
CY  - Philadelphia
PB  - Lippincott Williams & Wilkins
KW  - Clinical epidemiology
UR  - http://www.loc.gov/catdir/toc/ecip0510/2005008293.html
UR  - http://www.loc.gov/catdir/enhancements/fy0712/2005008293-d.html
ER  -