Author
A Citizen
1
A Stockholder
1
A member of the bar, pseud
1
Acworth, William Mitchell, Sir
1
Adams, Charles Francis, 1835-1915
2
Adams, Henry, 1838-1918
1
Adler, Dorothy R.
1
Aiken, S. C. 1790-1879
1
Alberdi, Juan Bautista, 1810-1884
1
Albertype Co
1
Albrecht, Harry P.
2
Albright, George Leslie, 1893-1916
1
Alleghany Railroad and Coal Co
1
Alleghany Railroad and Coal Company
1
Allen, Horatio, 1802-1890
1
Allen, John E.
2
America's Industrial Heritage Project
2
American Philosophical Society
1
American Railway Master Mechanics Association Convention
1
American Society of Civil Engineers
1
American Society of Civil Engineers Special Committee on rail sections
1
American Society of Mechanical Engineers
1
Amstutz, Marley E.
1
Amtrak National Railroad Passenger Corporation
1
Anderson, Harman
2
Andrews, Clinton T.
1
Applegate, Howard L.
1
Archer, Robert F.
1
Arnesen, Eric
1
Arnold, Andrew Bernard
2
Ashbridge, Thomas
1
Association of American Railroads
10
Association of American Railroads (Washington, D.C.)
1
Association of American Railroads. Bureau of Railway Economics
1
Association of American Railroads. Bureau of Railway Economics. Library
1
Association of American Railroads. Railroad Committee for the Study of Transportation
5
Atkinson, Edward, 1827-1905
1
Atkinson, Samuel Coate
1
Atlantic and Great Western Railway Co
1
Atlantic and Great Western Railway Company
1
Atlas Portland Cement Co. (New York)
1
Atterbury, William Wallace, 1866-1935
5
Avery, John, 1819-1902
1
Bache, Hartman, 1797-1872
1
Bache, Hartman, 797-1872
1
Baer, Christopher T.
1
Baetjer, Harold H.
1
Baker, G. W.
1
Baker, Joseph B.
1
Bakewell, Thomas, 1792-1866
1
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