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Byron, William D.; Lacy, Robert (December 28, 1934). Report of the State Roads Commission of Maryland (1931–1934 ed.). Baltimore: Maryland State Roads Commission. pp. 328, 342. Retrieved August 17, 2016.
Highway Information Services Division (December 31, 2015). Highway Location Reference. Maryland State Highway Administration. Retrieved August 17, 2016.
Highway Information Services Division (December 31, 2012). Highway Location Reference. Maryland State Highway Administration. Retrieved August 17, 2016.