TY  - BOOK
AU  - MacMahon, Brian
AU  - Trichopoulos, Dimitrios (jt. auth.)
TI  - Epidemiology: : principles and methods
SN  - 0316542229
U1  - 614.4 
PY  - 1996///
CY  - Boston
PB  - Little brown and company
KW  - Epidemiology methods
N1  - HB; include bibliography and index
ER  -