TY  - BOOK
AU  - MacMahon,Brian
AU  - Pugh,Thomas F.
TI  - Epidemiology: principles and methods
SN  - 0-316-54259-8
PY  - 1970///
CY  - Boston
PB  - Little, Brown and company
N1  - Бібліогр. : c. 333-361, Index
ER  -