Author
Allegheny and South Side Railway Company
2
Allegheny and South Side Railway Company,
1
Ambler, Charles Henry, 1876-
1
Association of American Railroads
8
Association of American Railroads. Bureau of Railway Economics. Library
1
Association of American Railroads. Railroad Committee for the Study of Transportation
2
Association of Centenary Firms and Corporations of the United States
1
Atterbury, William Wallace, 1866-1935
1
Avenue of the Arts, Inc
1
Baldwin, Leland Dewitt, 1897-
1
Baltimore Citizens
1
Baltimore and Ohio Railroad Co
1
Baltimore and Ohio Railroad Company
3
Bank of Pennsylvania
1
Barker, Charles R.
1
Bellwood Antis Public Library. Board
1
Benner, Walter M., 1888-
1
Bennett's Branch Improvement Company
1
Bigham, T.J.
1
Black, Robert C., 1914-
1
Blankenburg, Rudolph, 1843-1918
1
Boorse, J. W.
1
Brown, R. W.
1
Buckman, Morris
2
Bureau of Municipal Research (Philadelphia, Pa.)
1
Bureau of Railway Economics (Washington, D.C.)
1
Burr, David H., 1803-1875,
1
Camden and Amboy Railroad and Transportation Company
2
Cameron, Christopher
1
Campbell, B. B.
1
Carnesi, Mônica
2
Carson, O. E.
1
Centennial Exhibition
1
Chetwood, J. J.
1
Circus World Museum (Baraboo, Wis.)
2
Citizens' Committee on the Subject of the North Branch Canal (Bradford County, Pa.)
2
Clinton, pseud
1
Commercial Exchange of Philadelphia (Pa.)
2
Commercial Exchange of Philadelphia (Pa.),
1
Confederate States of America
1
Cooke, Sholto
1
Cooperative Project on National Transportation Policy (U.S.)
1
Cox, Harold E.
2
Cox, Harold E. Dr
1
Crane, Edward
1
Cranmer, Horace Jerome, 1920-
1
Cross, Dorothy
1
Dahlinger, Fred
1
Dahlinger, Fred, 1951-
1
DeGraw, Ronald, 1942-
1
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