Columbia subject headings:
Arab countries--Politics and government--21st century.
Political violence--Arab countries.
Violence--Political aspects--Arab countries.
Harvard subject headings:
Arab countries--Politics and government--21st century.
Political violence--Arab countries.
Violence--Political aspects--Arab countries.
Princeton subject headings:
Arab countries--Politics and government--21st century.
Political violence--Arab countries.
Violence--Political aspects--Arab countries.