History of Belfield (1934)
Privy Cleaning Receipt, 1885
Bill for Privy Cleaning, 1869
Bacteria in Delaware River, Torresdale Filters, 1913
Sewer Demand Taken to City Hall, 7/25/32
“Philadelphia Underground,” Jan. 29, 1961
“Sewer Crawlers,” January 29, 1961
Color Diagram of Plan for the Collection, Purification and Disposal of the Sewage of the City of Philadelphia
