"Baltimore and Ohio Railroad Company Eastern Lines distribution of cars for coal loading, November, 1922, and mine ratings effective December 19, 1922."; "Baltimore and Ohio Railroad Company. Eastern Lines."; "Baltimore and Ohio Railroad Company."; "Coal mines and mining--United States.", "Coal transportation--United States."; "Baltimore and Ohio Railroad Company. Eastern Lines."; "1922"; "Serial issue. Issued as: Baltimore and Ohio Railroad Company. Eastern Lines. Bulletin, no.2-A."; ""; "P17647"; "pec"; "Baltimore and Ohio Railroad Company.", "Coal transportation--United States.", "Coal mines and mining--United States."; "14256"; .