http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
diffusion of the disease 1970-1975, with particular emphasis on West Africa
A revision of the author's thesis, Michigan State University, 1974, under title: Diffusion of cholera in West Africa, 1970-1974.
African environment : Special report ; 3