Map Lovers’ Monday: Topography of Philadelphia from 1863
Sandy Run Watershed and the Holmesburg Water Works
Roberts Mill, Wingohocking Creek, 1871
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Wingohocking Sewer across Penn St.
History of Belfield (1934)
Early photographs of Fairmount and vicinity, 1848
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