Columbia subject headings:
Dhows--Social aspects--Indian Ocean.
Indian Ocean--Navigation--History.
Islam and culture--Indian Ocean.
Seafaring life--Indian Ocean.
Trade routes--Indian Ocean.
Harvard subject headings:
Dhows--Indian Ocean Region--History.
Dhows--Social aspects--Indian Ocean.
Indian Ocean Region--Civilization.
Indian Ocean Region--Commerce--History.
Indian Ocean--Navigation--History.
Islam and culture--Indian Ocean.
Seafaring life--Indian Ocean.
Trade routes--Indian Ocean.
Princeton subject headings:
Dhows--Indian Ocean Region--History.
Indian Ocean Region--Civilization.
Indian Ocean Region--Commerce--History.