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Emancipation Hall : a tribute to the slaves who helped build the U.S. Capitol : hearing before the S

United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Economic Development, Public Buildings, and Emergency Management.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2007. 2007

Famous building stones of our nation's capital

[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2012] 2012