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. 22, 49. Retrieved August 6, 2016.
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. 64. Retrieved August 6, 2016.
Whitman, Ezra B.; Webb, P. Watson; Thomas, W. Frank (March 15, 1943). Report of the State Roads Commission of Maryland (1941–1942 ed.). Baltimore: Maryland State Roads Commission. p. 81. Retrieved August 6, 2016.
Whitman, Ezra B.; Webb, P. Watson; Thomas, W. Frank (March 1, 1945). Report of the State Roads Commission of Maryland (1943–1944 ed.). Baltimore: Maryland State Roads Commission. p. 77. Retrieved August 6, 2016.
Highway Information Services Division (December 31, 2015). Highway Location Reference. Maryland State Highway Administration. Retrieved August 13, 2016.
Highway Information Services Division (December 31, 2010). Highway Location Reference. Maryland State Highway Administration. Retrieved August 13, 2016.
Highway Information Services Division (December 31, 2006). Highway Location Reference. Maryland State Highway Administration. Retrieved August 13, 2016.