Columbia subject headings:
Zanzibar--History--1890-1964.
Zanzibar--Politics and government--1890-1964.
Harvard subject headings:
Zanzibar--History--1890-1964.
Zanzibar--Politics and government--1890-1964.
Princeton subject headings:
Zanzibar--History--1890-1964.
Zanzibar--Politics and government--1890-1964.