State constitutions of the united states

 Maddex, Robert L.;

Washington, D.C. : CQ Press , 1998

CQ's Guide TO THE U.S.Constitution

 Mitchell, Ralph;

Washington, D.C. : CQ Press , 1994

The U.S. constitution A to Z

 Maddex, Robert L.;

Washington, D.C. : CQ Press , 2002

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