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Web site: National Geographic Atlas of the World
Web site: The World Almanac and Book of Facts
Web page: Bartlett's Familiar Quotations - 17th Edition(Amazon)
Web page: Bartlett's Familiar Quotations - 10th Edition - online (Bartleby)
Web page: Bartlett's Familiar Quotations - 9th Edition - public domain (Gutenberg Project)
Web site: Marquis Who's Who