Columbia subject headings:
Harvard subject headings:
Arab countries--Politics and government--21st century.
Revolutions--Arab countries--History--21st century.
Princeton subject headings:
Africa, North--Politics and government--21st century.
Arab countries--Politics and government--21st century.
Middle East--Politics and government--21st century.
Revolutions--Africa, North--History--21st century.
Revolutions--Arab countries--History--21st century.
Revolutions--Middle East--History--21st century.