National Road. Baltimore: Johns Hopkins University Press. p. 131. ISBN 978-0-8018-5155-1. Retrieved October 11, 2008 – via Google Books. Maryland State Highway...
Thompson, George F. (1996). The National Road. JHU Press. p. 166. ISBN 978-0-8018-5155-1. History of the Bushnell Building Archived April 9, 2015, at the Wayback...
Thompson, George F. (1996). The National Road. JHU Press. pp. 34–. ISBN 978-0-8018-5155-1. Taylor, Craig; Mittler, Elliott; Lund, Le Val (1998). Overcoming...