Columbia subject headings:
Africa, East--History--To 1886.
Arabs--Africa, East--History--19th century.
Arabs--Tanzania--Zanzibar--History--19th century.
Oman--History.
Zanzibar--History--To 1890.
Harvard subject headings:
Africa, East--History--To 1886.
Arabs--Africa, East--History--19th century.
Arabs--Tanzania--Zanzibar--History--19th century.
Oman--History.
Zanzibar--History--To 1890.
Princeton subject headings:
Africa, East--History--To 1886.
Arabs--Africa, East--History--19th century.
Arabs--Tanzania--Zanzibar--History--19th century.
Oman--History.
Zanzibar--History--To 1890.