Author
Pennsylvania Railroad
9
Association of American Railroads. Bureau of Railway Economics
3
Bureau of Railway Economics (Washington, D.C.)
3
Association of American Railroads
2
Baltimore and Eastern Railroad Company
2
Lehigh and New England Railroad Company
2
Long Island Rail Road
2
Monroe, Joseph Elmer, 1894-
2
Parmelee, Julius Hall, 1883-
2
Philadelphia Board of Trade
2
Railway Accounting Officers Association
2
American Hotel Association
1
American Hotel Association of the United States and Canada
1
Baltimore and Eastern Railroad Co
1
Baltimore and Ohio Railroad Company
1
Baltimore and Ohio Railroad Company. Relief Department
1
Brotherhood of Locomotive Firemen and Enginemen
1
Catawissa, Williamsport & Erie Railroad Company
1
Catawissa, Williamsport and Erie Railroad Company
1
Center for Canal History and Technology (Easton, Pa.)
1
Cobb, Charles
1
Commercial and Financial Chronicle
1
Doggett, John, Jr
1
National Railway Historical Society
1
National Railway Historical Society. Philadelphia Chapter
1
New York, New Haven, and Hartford Railroad Company
1
Norfolk and Western Railway Company
1
Northern Central Railway Company
1
Penn Central Railroad
1
Pennsylvania Company
1
Philadelphia and Baltimore Central Railroad Company
1
Philadelphia, Wilmington, and Baltimore Rail Road Company
1
Pittsburgh, Cincinnati, Chicago and St. Louis Railway Company
1
Thompson, Slason, 1849-1935
1
Vernon, Edward
1
Western New York and Pennsylvania Railroad Company
1
William B. Dana & Co., Pub
1