Columbia subject headings:
Harvard subject headings:
Time--Religious aspects--Islam
Time--Social aspects--Tanzania--Zanzibar.
Zanzibar--Civilization--19th century.
Zanzibar--Civilization--20th century.
Princeton subject headings:
Time--Religious aspects--Islam.
Time--Social aspects--Tanzania--Zanzibar.
Zanzibar--Civilization--19th century.
Zanzibar--Civilization--20th century.