website. United States Census Bureau. [2008-01-31]. (原始内容存档于1996-12-27). US Boardon Geographic Names. United States Geological Survey. 2007-10-25 [2008-01-31]
website. United States Census Bureau. [2008-01-31]. (原始内容存档于1996-12-27). US Boardon Geographic Names. United States Geological Survey. 2007-10-25 [2008-01-31]