Sources for TF
- http://www.pressherald.com/archive/tax-foundations-updates-show-coverage-flaws-coverage_2008-08-15.html
- http://www.ctj.org/taxjusticedigest/archive/2008/08/tax_foundation_state_rankings.php
- http://projects.publicintegrity.org/oil/report.aspx?aid=347
- http://climateprogress.org/2010/03/31/report-koch-industries-outspends-exxon-mobil-on-climate-and-clean-energy-disinformation/
- http://www.greenpeace.org/usa/en/campaigns/global-warming-and-energy/polluterwatch/koch-industries/tax-foundation/
- http://www.onewisconsinnow.org/blog/2010/04/CHWf.html