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. 196. Retrieved 2013-02-17.
McCain, Russell H.; Hall, Avery W.; Nichols, David M. (December 15, 1952). Report of the State Roads Commission of Maryland (1951–1952 ed.). Baltimore: Maryland State Roads Commission. p. 90. Retrieved 2013-02-17.