The world factbook 2008 - United States. Central Intelligence Agency (Washington D.C. Potomac Books, 2008)
"CIA's 2007 edition."
"In general, information available as of 1 January 2008 was used in the preparation of this edition."
Keywords: Geography -- Handbooks, manuals, etc; World politics -- Handbooks, manuals, etc; Potitical science -- Handbooks, manuals, etc; Statistics