Tabler, H.E.; Wilkinson, C. Nice; Luthardt, Frank F. (December 4, 1936). Report of the State Roads Commission of Maryland (1935โ1936 ed.). Baltimore: Maryland State Roads Commission. p. 54. Retrieved 2013-09-05.
Byron, William D.; Lacy, Robert (December 28, 1934). Report of the State Roads Commission of Maryland (1931โ1934 ed.). Baltimore: Maryland State Roads Commission. p. 346. Retrieved 2013-09-05.