Thomas Mill Covered Bridge over Wissahickon Creek (Picturesque America)
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Models of Change
Mount Moriah Historic Cemetery and Arboretum
Wingohocking Sewer across Penn St.
The ecology of Center City, Philadelphia (in case you didn’t know there was any)
History of Belfield (1934)
Early photographs of Fairmount and vicinity, 1848
Early visions of Philadelphia’s airport
Frankford Creek Watershed: A historical overview of the Philadelphia section
