 
		 
		 
		Roberts Mill, Wingohocking Creek, 1871
 
		Dripps map of Frankford and vicinity, 1849
 
		Wingohocking Sewer across Penn St.
 
		History of Belfield (1934)
 
		Frankford Creek Watershed: A historical overview of the Philadelphia section
 
		Report on channelization of Frankford Creek for flood control (1947)
 
		Frankford Creek Watershed Historical Timeline
 
		Requiem for a stream: Adams Run in Oak Lane
 
		Filling Low Land: A Story of Ash-Dumping in the Wingohocking Creek Watershed
 
		Down Under!
