Norell staffan E
A short course in epidemiology - 1st ed - New York : Raven, NY, 1991. - ix, 192 p. : ill.
0881678422
Case control studies
Cohort studies
Research design
WA 950, N834s
A short course in epidemiology - 1st ed - New York : Raven, NY, 1991. - ix, 192 p. : ill.
0881678422
Case control studies
Cohort studies
Research design
WA 950, N834s