Columbia subject headings:
Harvard subject headings:
Diplomats--Canada--Biography
Fowler, Robert R., 1944---Captivity, 2008-2009.
Hostages--Canada--Biography.
Hostages--Niger--Biography.
Qaida (Organization)
Princeton subject headings:
Diplomats--Canada--Biography.
Fowler, Robert R., 1944---Captivity, 2008-2009.
Hostages--Canada--Biography.
Hostages--Niger--Biography.