Columbia subject headings:
Harvard subject headings:
Qaida (Organization)
September 11 Terrorist Attacks, 2001.
Terrorism--Religious aspects--Islam
War on Terrorism, 2001-2009
Princeton subject headings:
Qaida (Organization)
September 11 Terrorist Attacks, 2001.
Terrorism--Religious aspects--Islam.
War on Terrorism, 2001-2009.