Columbia subject headings:
IS (Organization)
Islamic fundamentalism--Middle East.
Terrorism--Middle East--History.
Terrorism--Religious aspects--Islam.
Harvard subject headings:
IS (Organization)
Islamic fundamentalism--Middle East.
Terrorism--Middle East--History.
Terrorism--Religious aspects--Islam
Princeton subject headings:
IS (Organization)
Islamic fundamentalism--Middle East.
Terrorism--Middle East--History.
Terrorism--Religious aspects--Islam.