North American Vertical Datum of 1988

[2011-10-24]. （原始内容存档于2011-10-15）.  Elevation adjusted to North American Vertical Datum of 1988. Population and Housing Unit Estimates. United States Census

[2011-10-24]. （原始内容存档于2011-10-15）.  Elevation adjusted to North American Vertical Datum of 1988. Median Annual Household Income. The Henry J. Kaiser Family

2001 [2011-12-28]. （原始内容存档于2011-10-15）.  海拔高度根據1988年北美洲垂直資料（英语：North American Vertical Datum of 1988）調整。 Median Annual Household Income. The Henry J

[2011-10-24]. （原始内容存档于2012-07-22）.  Elevation adjusted to North American Vertical Datum of 1988. 2020 Census Apportionment Results. census.gov. United States

[2011-10-24]. （原始内容存档于2013-11-09）.  Elevation adjusted to North American Vertical Datum of 1988. Arave, Lynn. Utah's basement—Beaver Dam Wash is state's