1. An epidemic of meningococcal infection at Zaria, Northern Nigeria. 3. Meningococcal carriage;Hassan-King;Trans Roy Soc Trop Med Hyg,1979
2. Laméningite cérébrospinale en Afrique;Lapeyssonnie;Bull Wld Hlth Org,1963
3. A serogroup A meningococcal polysaccharide vaccine. Studies in the Sudan to combat cerebrospinal meningitis caused by Neisseria meningitidis group A;Erwa;Bull Wld Hlth Org,1973
4. Le vaccin anti-méningococcique du type A. premiers essais contrôlés en Afrique de L'Ouest;Ettori;Med Trop,1977