Birch’s Views of Philadelphia, 1800
Pennypack Park Map
Plans and maps of the Pennypack Creek Watershed in Philadelphia
Mount Moriah Historic Cemetery and Arboretum
The ecology of Center City, Philadelphia (in case you didn’t know there was any)
MEET YOUR ENEMY: THE RAT
Smith and Windmill Islands
High Water: Flooding in Philadelphia
Visionary planning report for Philadelphia region, 1928
The Water and Drainage History of Philadelphia
