বিষয়গুলি: “...United States. Bureau of the Census http://id.loc.gov/authorities/names/n83054431....”

বিষয়গুলি: “...Census districts United States....”

বিষয়গুলি: “...Housing United States Statistics http://id.loc.gov/authorities/subjects/sh2008105836....”

বিষয়গুলি: “...Metropolitan areas United States Statistics. http://id.loc.gov/authorities/subjects/sh2010101197...”
State and metropolitan area data book from U.S. Government Documents