Columbia subject headings:
Harvard subject headings:
Postal censor stamps--Africa, West--History--20th century.
Postal service--Censorship--Africa, West--History--20th century.
World War, 1914-1918--Censorship--Africa, West.
World War, 1939-1945--Censorship--Africa, West.
Princeton subject headings:
Postal censor stamps--Africa, West--History--20th century.
Postal service--Censorship--Africa, West--History--20th century.
World War, 1914-1918--Censorship--Africa, West.
World War, 1939-1945--Censorship--Africa, West.