You would not have wanted to drink it: Philadelphia’s water supply in 1884
Newspaper Clipping Scrapbooks of Frederic Graff Jr.,Chief Engineer of the Philadelphia Water Department: Part 1, 1854-1857
Board of Health Newspaper Clipping Scrapbooks at City Archives of Philadelphia, 1891-1908
Petition of manufacturers along the Schuylkill River in Philadelphia for a new upstream water supply, 1868
Visions of the Schuylkill, 1884 and Now
The Water Supply Problem of Philadelphia, 1899
The Water and Drainage History of Philadelphia: A seven-part course
Half a Century of Clean Water: The Clean Water Act, 1972-2022
Effects of Expansion of Gas Bubbles in Enscher Sludge Shown in Right-Hand Cylinder
State Street pipeline construction, 1904
