TY  - BOOK
AU  - MacMahon, Brian
AU  - Trichopoulos, Dimitrios
TI  - Epidemiology: principles and methods 
SN  - 0-316-54222-9
AV  - RA651 .M33 1996
PY  - 1996///
CY  - Boston
PB  -  Little, Brown
KW  - Epidemiology
KW  - Epidemiologic Methods
ER  -