Frequently Requested Statistics on Immigrants in the United States / Migration Policy Institute, October 2007
http://www.migrationinformation.org/USfocus/display.cfm?id=649
Aaron Terrazas, Jeanne Batalova, Velma Fan
"The US debate over immigration policy has raised many questions about immigrants: their origins, numbers and characteristics, as well as who has settled in which states. This Spotlight provides answers to many of these frequently asked questions by bringing together resources from the Migration Policy Institute, the US Census Bureau's American Community Survey and Decennial Census, US Departments of Homeland Security and State, and Mexico's National Population Council."