Columbia subject headings:
Turkey--History--Ottoman Empire, 1288-1918.
Yemen (Republic)--History--16th century.
Ṣanʻāʼ (Yemen)--History--16th century.
Harvard subject headings:
Turkey--History--1453-1683
Turkey--Relations--Yemen, North.
Yemen, North--History
Yemen, North--Relations--Turkey.
Princeton subject headings:
Ṣanʻāʼ (Yemen)--History--Sources.
Yemen (Republic)--History--Sources.