Clark, W. B., Hodgkins, W. C., Mathews, E. B., & Burchard, E. L. (1908). Report on the resurvey of the Maryland-Pennsylvania boundary, part of the Mason and Dixon Line. [Baltimore: Johns Hopkins Press.

Clark, William Bullock, William Candler Hodgkins, Edward Bennett Mathews, and Edward Lawver Burchard. Report On the Resurvey of the Maryland-Pennsylvania Boundary, Part of the Mason and Dixon Line. [Baltimore: Johns Hopkins Press, 1908.

Clark, William Bullock, William Candler Hodgkins, Edward Bennett Mathews, and Edward Lawver Burchard. Report On the Resurvey of the Maryland-Pennsylvania Boundary, Part of the Mason and Dixon Line. [Baltimore: Johns Hopkins Press, 1908.