Columbia subject headings:
IS (Organization)
Islam and politics--History--21st century.
Islamic fundamentalism--History--21st century.
Qaida (Organization)
Terrorism--Religious aspects--Islam.
Harvard subject headings:
IS (Organization)
Islam and politics--History--21st century.
Islamic fundamentalism--History--21st century.
Qaida (Organization)
Terrorism--Religious aspects--Islam
Princeton subject headings:
IS (Organization)
Islam and politics--History--21st century.
Islamic fundamentalism--History--21st century.
Qaida (Organization)
Terrorism--Religious aspects--Islam.