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Watersheds
Delaware River Watershed
Map of Philadelphia Harbor, Delaware and Schuylkill, 1912
Old U. S. Navy Yard
Coal Depot, Richmond, on the Delaware (Picturesque America)
Philadelphia Navy Yard, July 1872
CITIZENS’ BUSINESS: 1939-1946
Philadelphia the Manufacturing and Industrial Capital map, 1906
Henry Disston & Sons Keystone Saw Works