Byron, William D.; Lacy, Robert (December 28, 1934). Report of the State Roads Commission of Maryland (1931–1934 ed.). Baltimore: Maryland State Roads Commission. p. 22. Retrieved August 1, 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 1, 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 1, 2016.
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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. 43, 75. Retrieved August 1, 2016.