Highway Information Services Division (December 31, 2013). Highway Location Reference. Maryland State Highway Administration. Retrieved November 11, 2012.
"Front Cover"(PDF). The Maryland Asphalt Paver. The Maryland Asphalt Assoc. Spring–Summer 1999. p. 2. Archived from the original(PDF) on November 19, 2003. Retrieved August 1, 2012.
web.archive.org
"Front Cover"(PDF). The Maryland Asphalt Paver. The Maryland Asphalt Assoc. Spring–Summer 1999. p. 2. Archived from the original(PDF) on November 19, 2003. Retrieved August 1, 2012.