TY  - BOOK
AU  - Sackett,David L.
AU  - Haynes,R.Brian
AU  - Tugwell,Peter
TI  - Clinical Epidemiology: A basic science for clinical medicine 
SN  - 0-316-76595-3
PY  - 1985///
CY  - Boston, Toronto
PB  - Little, Brown and Company
KW  - Epidemiology
N1  - Includes bibliographical references and index
ER  -