Fairmount Water Works: The Surprising History of an American Landmark
Newspaper Clipping Scrapbooks of Frederic Graff Jr.,Chief Engineer of the Philadelphia Water Department: Part 1, 1854-1857
Newspaper Clipping Scrapbooks of Frederick Graff Jr., Chief Engineer of the Philadelphia Water Department. Part 2: 1858-1871
The Water and Drainage History of Philadelphia: A seven-part course
Half a Century of Clean Water
Grit Chamber, Essen, Germany
Sludge Presses for Grease Recovery, Bradford, England
Drain water from sludges obtained from sedimentation, septic and Emscher tanks
A Day in the Ma’sh – Oil Refinery
Baldwin Locomotive Works