Columbia subject headings:
IS (Organization)
Islam and state--History--21st century.
Islamic fundamentalism--Political aspects--Arab countries.
Jihad.
Terrorism--Arab countries.
Terrorism--Iraq.
Terrorism--Syria.
Harvard subject headings:
IS (Organization)
Islam and state--History--21st century.
Islamic fundamentalism--Political aspects--Arab countries.
Jihad
Terrorism--Arab countries.
Terrorism--Iraq
Terrorism--Middle East
Terrorism--Syria
Princeton subject headings:
IS (Organixation)
Islam and state--History--21st century.
Islamic fundamentalism--Political aspects--Arab countries.
Jihad.
Terrorism--Arab countries.
Terrorism--Iraq.
Terrorism--Syria.