- Federal and National Data on Unauthorized Immigration
- Congressional Budget Office, Special Collection on Immigration, specifically
- The Impact of Unauthorized Immigrants on the Budgets of State and Local Governments
- Effects of Unauthorized Immigration
- The One-Man One-Vote Myth: The Impact of Non-Voting Populations on Congressional Apportionment from CtSDC in December 2007.
- Impact of Undocumented Populations on 2010 Congressional Reapportionmentfrom CtSDC in September 2007.
- Immigration Links
- Center for Immigration Studies
- Brookings Instititution on Immigration