Columbia subject headings:
Meningitis, Cerebrospinal--Africa, West--History--20th century.
Meningitis, Cerebrospinal--Sudan--History--20th century.
Harvard subject headings:
Meningitis, Cerebrospinal--Africa, West--History--20th century.
Meningitis, Cerebrospinal--Sudan--History--20th century.
Princeton subject headings:
Meningitis, Cerebrospinal--Africa, West--History--20th century.
Meningitis, Cerebrospinal--Sudan--History--20th century.