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. pp. 79, 218, 219. Retrieved September 11, 2016.
books.google.com
Mackall, John N.; Crothers, Omar D.; Winebrener, D.C. (January 1924). Annual Reports of the State Roads Commission of Maryland (1920–1923 ed.). Baltimore: Maryland State Roads Commission. p. 44. Retrieved September 11, 2016.
Maryland Road Construction Progress Log(PDF). Baltimore: Maryland State Highway Administration. Contract Numbers: K-155X-211 (May 1, 1947), K-164-215 (January 29, 1948), K-210X-1-220 (January 13, 1959), K-273-3-241 (January 17, 1966). Retrieved September 11, 2016 – via Maryland State Archives.
Maryland Road Construction Progress Log(PDF). Baltimore: Maryland State Highway Administration. Contract Numbers: K-331-277 (June 19, 1972), K-273-6-271 (December 5, 1973), K-432-5-184 (May 13, 2003). Retrieved September 11, 2016 – via Maryland State Archives.
roads.maryland.gov
Highway Information Services Division (December 31, 2015). Highway Location Reference. Maryland State Highway Administration. Retrieved September 11, 2016.