Columbia subject headings:
Islam--21st century.
Islam--History.
Kufr (Islam)
Terrorism--Religious aspects--Islam.
Harvard subject headings:
Islam--21st century
Islam--History
Kufr (Islam)
Terrorism--Religious aspects--Islam
Princeton subject headings:
Islam--21st century.
Islam--History.
Kufr (Islam)
Terrorism--Religious aspects--Islam.