The Schuylkill Navigation: A Journey on the Historic Nineteenth Century Waterway
Thomas Gill Maps of the Schuylkill Navigation, 1827
Map Lovers’ Monday: Schuylkill River from Wissahickon Creek to Norristown, 1913
Map of Philadelphia Harbor, Delaware and Schuylkill, 1912
Schuylkill River from below the South Street Bridge, 1873
Chestnut Street Bridge, on the Schuylkill River (Picturesque America)
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
