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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. 318–319. Retrieved May 24, 2013.
Beall, J. Glenn; Jarboe, Elmer R.; Obrecht, George F., Sr. (March 4, 1939). Report of the State Roads Commission of Maryland (1937–1938 ed.). Baltimore: Maryland State Roads Commission. p. 109. Retrieved May 24, 2013.{{cite book}}: CS1 maint: multiple names: authors list (link)
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. 47. Retrieved May 24, 2013.
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. pp. 47, 85. Retrieved May 24, 2013.
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. 94. Retrieved May 24, 2013.
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Highway Information Services Division (December 31, 2015). Highway Location Reference. Maryland State Highway Administration. Retrieved August 29, 2017.