American constitutional law / Alpheus Thomas Mason

 Mason, Alpheus Thomas; Bean, William M.;

New Jersey : Prentice Hall , 1978

The U.S. Constitution A to Z

 Maddex, Robert L.;

Washington, D.C. : CQ Press , 2002

State constitutions of the united states

 Maddex, Robert L.;

Washington, D.C. : CQ Press , 1998

The U.S. constitution A to Z

 Maddex, Robert L.;

Washington, D.C. : CQ Press , 2002