| cato.org | The Cato Institute: Public Policy Analysis, Limited Government, Free Markets |
| ctj.org | Itep : Institute On Taxation And Economic Policy And Gjf |
| atr.org | Americans for Tax Reform |
| natprior.org | National Priorities Project |
| cbpp.org | Center on Budget and Policy Priorities |
| iret.org | Institute for Research on the Economics of Taxation |
| taxfoundation.org | Tax Foundation Home |
| investinamerica.org | Invest in America Campaign |
| heritage.org | Heritage Foundation |
| center4studytax.com | Center For The Study of Taxation |
| atr.org | www.atr.org/ |
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