Map of Philadelphia Harbor, Delaware and Schuylkill, 1912
Schuylkill River from below the South Street Bridge, 1873
Schuylkill River from below the South Street Bridge, 1873
Frankford Creek Watershed: A historical overview of the Philadelphia section
Report on channelization of Frankford Creek for flood control (1947)
Frankford Creek Watershed Historical Timeline
A Tour of Philadelphia’s Delaware River Waterfront in 1876