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Harlowe, Jerry L. Mile Markers of the Baltimore and Frederick-Town Turnpike 1805-2005: A Finder's Guide. Catonsville, MD: Patapsco Falls Press, 2005.
Pomeroy, Jennifer Yongmei. Analyzing Municipal Annexations: Case Studies in Frederick and Caroline Counties of Maryland, 1990-2010. Ph.D. diss., University of Maryland, College Park, 2012.