TY  - BOOK
AU  - Haynes,R B
AU  - Sackett,D L
AU  - Guyatt,G H
TI  - Clinical epidemiology: how to do clinical practice research 
SN  - 9780781745246
PY  - 2006///
CY  - Philadelphia
PB  -  Lippincott Williams & Wlikins
KW  - Epidemiology
KW  - Cd rom
ER  -