Author
A Burlingtonian
1
A Citizen
1
A New-Yorker, pseud
2
A Philadelphian
1
A Stockholder
1
A holder of Reading securities, pseud
1
A member of the bar, pseud
1
A. and G. Ralston and Company
1
A.H. Mueller & Co
1
Acworth, William Mitchell, Sir
1
Adams, Charles Francis, 1835-1915
3
Adams, Charles J. 1947-
1
Adams, Henry, 1838-1918
1
Adams, Herbert B. 1850-1901
1
Adler, Dorothy R.
1
Aiken, S. C.
1
Aiken, S. C. 1790-1879
2
Alberdi, Juan Bautista, 1810-1884
1
Albertype Co
8
Albrecht, Harry P.
3
Albright, George Leslie, 1893-1916
1
Alexander, Edwin P.
3
Alleghany Railroad and Coal Co
1
Alleghany Railroad and Coal Company
1
Allegheny Portage Railroad Company
3
Allegheny Valley Railroad Company
1
Allegheny Valley Railway Company
1
Allegheny and South Side Railway Company
1
Allen, Horatio, 1802-1890
1
Allen, John E.
2
Allen, Lane & Scott
2
Allen, Walter Spooner
1
Alwine, Leonard E.
1
America's Industrial Heritage Project
2
American Council on Race Relations
1
American Hotel Association
1
American Hotel Association of the United States and Canada
1
American Philosophical Society
2
American Railway Master Mechanics Association Convention
1
American Society for Testing Materials
1
American Society of Civil Engineers
2
American Society of Civil Engineers Special Committee on rail sections
1
American Society of Mechanical Engineers
1
American Transit Accountants' Association
1
American street and interurban accountants' association
1
Ames, Charles Edgar, 1895-
1
Amstutz, Marley E.
1
Amtrak National Railroad Passenger Corporation
1
Anderson, Harman
2
Andrews
1
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