TY  - BOOK
AU  - MacMahon,Brian
AU  - Trichopoulos,Dimitrios
TI  - Epidemiology: principles and methods 
SN  - 0316542229
AV  - RA 651 .M24 1996
U1  - 614.4 20
PY  - 1996///
CY  - Boston
PB  - Little, Brown
KW  - Epidemiology
KW  - Epidemiologic Methods
N1  - Includes bibliographical references (p. 303-331) and index
UR  - http://www.loc.gov/catdir/enhancements/fy1012/96005095-t.html
ER  -