routes divided among the same Postal Regions into which Post Offices were classified. See also Owney, railway service mascot Railway Mail Service Library Washington Park and Zoo Railway References Citations Sources Carr, Clark E. (1909) The Railway Mail Service, Its Origin and Development, A.C. McClurg & Co., Chicago. Bergman, Edwin B. (1980) 29 Years to Oblivion, The Last Years of Railway Mail Service in the United States, Mobile Post Office Society, Omaha. Romanski, Fred J. The Fast Mail, History of the Railway Mail Service, Prologue Vol. 37 No. 3, Fall 2005, College Park, Maryland. Pennypacker, Bert The Evolution of Railway Mail, National Railway Bulletin Vol. 60 No. 2, 1995, Philadelphia. External links Mobile Post Office Society History of the United States Postal Service 1775-1993: Railway Mail Service National Postal Museum - Railway Post Office Bergman, Edwin B. (1980) 29 Years to Oblivion, The Last Years of Railway Mail Service in the United States, Mobile Post Office Society, Omaha, Nebraska. Wilking, Clarence. (1985) The Railway Mail Service, Railway Mail Service Library, Boyce, Virginia. Available as an MS Word file at http://www.railwaymailservicelibrary.org/articles/THE_RMS.DOC U.S. Post Office Department. (1956) MEN AND MAIL IN TRANSIT, Railway Mail Service Library, Boyce, Virginia. Portion available as a video clip at http://www.railwaymailservicelibrary.org/videos/m&mit01.MPG National Postal Transport Association. (1956) MAIL IN MOTION, Railway Mail Service Library, Boyce, Virginia. Portion available as a video clip at http://www.railwaymailservicelibrary.org/videos/MIM-01.MPG Rail transportation in the United States United States Postal Service History of Chicago