Author
Philadelphia Board of Trade
5
Association of American Railroads
4
Association of American Railroads. Railroad Committee for the Study of Transportation
4
Baltimore and Ohio Railroad Company
3
Lauck, W. Jett 1879-1949
3
Philadelphia Record
3
United Mine Workers of America
3
United States Anthracite Coal Commission
3
Atterbury, William Wallace, 1866-1935
2
Bartlett, Richard A.
2
Camden and Amboy Railroad and Transportation Company
2
Carroll, Thomas D.
2
Circus World Museum (Baraboo, Wis.)
2
Coldham, Peter Wilson
2
Earle, Alice Morse, 1851-1911
2
Fraley, F. 1804-1901
2
Gatzmer, William H.
2
Hesse-Wartegg, Ernst von, 1854-1918
2
Historical Records Survey (U.S.) New Jersey
2
MacGill, Caroline E.
2
Meyer, Balthasar Henry, 1866-1954
2
National Board of Trade
2
Nelson, Luther,
2
New Jersey Historical Records Survey Project
2
New Jersey State Planning Board
2
Omwake, John, 1885-
2
Pennsylvania Public Utility Commission
2
Powderly, Terence Vincent, 1849-1924
2
Shumway, George
2
Tucker, John, active 1862
2
United States. Department of the Treasury
2
Van der Zee, John
2
Alderman, Peter,
1
Allegheny and South Side Railway Company
1
American Canal and Transportation Center
1
American Geographical Society of New York
1
American Imprint Collection (Library of Congress)
1
American committee on highway transport
1
Anderson, Andy
1
Association of American Railroads. Bureau of Railway Economics
1
Association of Centenary Firms and Corporations of the United States
1
Atlantic Deeper Waterways Association
1
Bailey, Thomas Andrew, 1902-1983
1
Baltimore Citizens
1
Baltimore and Ohio Railroad Co
1
Bausman, Lottie M.
1
Beltrone, Art, 1941-
1
Beltrone, Lee, 1942-
1
Bieber, Ralph P. 1894-1981,
1
Black, Robert C., 1914-
1
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