Petition of manufacturers along the Schuylkill River in Philadelphia for a new upstream water supply, 1868
The Water Supply Problem of Philadelphia, 1899
The Water and Drainage History of Philadelphia: A seven-part course
Two reports on the state of the Schuylkill River, 1867
Half a Century of Clean Water: The Clean Water Act, 1972-2022
Thomas Run sewer outlet at Cobbs Creek