Columbia subject headings:
Hasa (Saudi Arabia : Province)--History.
Najd (Saudi Arabia)--History.
Wahhābīyah--History.
Harvard subject headings:
Hasa (Saudi Arabia : Province)--History.
Najd (Saudi Arabia)--History.
Wahhābīyah--History.
Princeton subject headings:
Arabian Peninsula--History--19th century.
Arabian Peninsula--History--20th century.
Turkey--History--19th century.
Turkey--History--20th century.
Wahhābīyah.