Columbia subject headings:
Banī ʻAlawī--Early works to 1800.
Yemen (Republic)--Biography--Early works to 1800.
Harvard subject headings:
Banī ʻAlawī--Biography--Early works to 1800.
Yemen (Republic)--Biography--Early works to 1800.
Princeton subject headings:
Banī ʻAlawī--Biography--Early works to 1800.
Yemen (People's Democratic Republic)--Biography--Early works to 1800.