Epidemiology : a research manual for South Africa /
Joubert, G.(Georgina)
Ehrlich, Rodney.
Katzenellenbogen, Judy M.
Abdool Karim, S. S.
Cape Town : Oxford University Press Southern Africa,
c2007.
Includes bibliographical references (p. 277-287) and index.
Epidemiology
Epidemiology
Epidemiology