Uhl, G. Clinton; Bruce, Howard; Shaw, John K. (October 1, 1930). Report of the State Roads Commission of Maryland (1927–1930 ed.). Baltimore: Maryland State Roads Commission. p. 201. Retrieved September 3, 2010.
Reindollar, Robert M.; George, Joseph M.; McCain, Russell H. (December 20, 1950). Report of the State Roads Commission of Maryland (1949–1950 ed.). Baltimore: Maryland State Roads Commission. p. 110. Retrieved September 3, 2010.
Highway Information Services Division (December 31, 2013). Highway Location Reference. Maryland State Highway Administration. Retrieved September 3, 2010.