Mackall, John N.; Darnall, R. Bennett; Brown, W.W. (January 1927). Annual Reports of the State Roads Commission of Maryland (1924–1926 ed.). Baltimore: Maryland State Roads Commission. pp. 31, 89. Retrieved September 3, 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. 218. Retrieved September 3, 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. pp. 44, 89. Retrieved September 3, 2016.
Highway Information Services Division (December 31, 2019). Highway Location Reference. Maryland State Highway Administration. Retrieved September 3, 2016.