November 9, 1985; November 26, 1991; September 15, 1994; October 15, 1999; November 2, 2000; September 18, 2001; November 24, 2002; November 29, 2004; October 31, 2005; November 3, 2006
Latin American Public Opinion Project; Center for the Americas at Vanderbilt; Seligson, Mitchell A.; United States. Agency for International Development