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. 21, 32. Retrieved 2014-02-06.
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. 3. Retrieved 2014-02-06.{{cite book}}: CS1 maint: multiple names: authors list (link)
Whitman, Ezra B.; Webb, P. Watson; Thomas, W. Frank (March 15, 1941). Report of the State Roads Commission of Maryland (1939–1940 ed.). Baltimore: Maryland State Roads Commission. p. 65. Retrieved 2014-02-06.
Reindollar, Robert M.; George, Joseph M.; McCain, Russell H. (February 15, 1949). Report of the State Roads Commission of Maryland (1947–1948 ed.). Baltimore: Maryland State Roads Commission. p. 119. Retrieved 2014-02-06.
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. 173. Retrieved 2014-02-06.
Bonnell, Robert O.; Bennett, Edgar T.; McMullen, John J. (December 15, 1958). Report of the State Roads Commission of Maryland (1957–1958 ed.). Baltimore: Maryland State Roads Commission. p. 62. Retrieved 2014-02-06.