Author
Chamber of Commerce of Greater Philadelphia
2
Eleutherian Mills Historical Library
2
Penjerdel (Corporation)
2
Carnegie Institution of Washington. Department of Economics and Sociology
1
Delaware. Bureau of Markets
1
Delaware. Department of Transportation. Division of Planning. Location and Environmental Studies Office
1
Delaware. State Historic Preservation Office
1
Edwards, Richard
1
Hagley Museum and Library
1
Hasse, Adelaide R. 1868-1953
1
Holt, Cheryl
1
Horsey, Outerbridge, 1777-1842
1
Koldehoff, Brad
1
LeeDecker, Charles H.
1
Louis Berger and Associates, Inc Cultural Resource Group
1
Munroe, John A., 1914-
1
Nelson, Daniel, 1941-
1
Philadelphia (Pa.) Inland Transportation Committee
1
Riggs, John Beverly, 1918-
1
Society of New-Castle County
1
United States. Federal Highway Administration
1