Portal:United States National Park Service, Weekly List, National Register of Historic Places… (1986)
“ PENNSYLVANIA, Allegheny County, Pittsburgh, Sixth Street Bridge (Allegheny County Owned River Bridges TR) , Allegheny River at Sixth St. (01/07/86) PENNSYLVANIA, Allegheny County, Pittsburgh, South Tenth Street Bridge (Allegheny County Owned River Bridges TR) , Monongahela River at S. Tenth St. ”
