TY  - BOOK
AU  -  Sackett, David L.
AU  -  Sackett, David L.
TI  -  Clinical epidemiology: a basic science for clinical medicine 
SN  -  0316765996
U1  -  614.4  20
PY  - 1991///
CY  -  Boston
PB  -  Little, Brown
KW  -  Clinical epidemiology
N1  -  Rev. ed. of: Clinical epidemiology / David L. Sackett, R. Brian Hayn es, Peter Tugwell. 1st ed. c1985;  Five Critical appraisal cards in pocket;  Includes bibliographical references and index
ER  -