Privy Cleaning Receipt, 1885
Frankford Creek: Sad History of an Urban Stream title page
Logan Demanding Flood Relief, 8/18/38
Sewer Demand Taken to City Hall, 7/25/32
“Philadelphia Underground,” Jan. 29, 1961
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
Leslie’s Illustrated Newspaper, Schuylkill Flood 1869
