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 August 28, 2016.
Reindollar, Robert M.; Webb, P. Watson; McCain, Russell H. (February 1, 1947). Report of the State Roads Commission of Maryland (1945–1946 ed.). Baltimore: Maryland State Roads Commission. p. 90. Retrieved August 28, 2016.
McCain, Russell H.; Bennett, Edgar T.; Kelly, Bramwell (November 12, 1954). Report of the State Roads Commission of Maryland (1953–1954 ed.). Baltimore: Maryland State Roads Commission. p. 152. Retrieved August 28, 2016.
Highway Information Services Division (December 31, 2015). Highway Location Reference. Maryland State Highway Administration. Retrieved August 28, 2016.