U.S. Decennial Census[2] 1790–1960[3] 1900–1990[4] 1990–2000[5] 2010–2014[6]
參考文獻编辑
^Population and Housing Unit Estimates. [2017-06-09]. (原始内容于2019-04-28).
^U.S. Decennial Census. United States Census Bureau. [2015-03-27]. (原始内容存档于2015-05-12).
^Historical Census Browser. University of Virginia Library. [2015-03-27]. (原始内容于2012-08-11).
^Forstall, Richard L. (编). Population of Counties by Decennial Census: 1900 to 1990. United States Census Bureau. 1995-03-27 [2015-03-27]. (原始内容于2015-04-03).
^Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000 (PDF). United States Census Bureau. 2001-04-02 [2015-03-27]. (原始内容 (PDF)于2014-12-18).
^State & County QuickFacts. United States Census Bureau. [2013-12-29]. (原始内容存档于2011-07-09).