1. Ehlen, J., & Whisonant, R. C. (2008). Military Geology of Antietam Battlefield, Maryland, USA—Geology, terrain, and casualties. Geology Today, 24(1), 20–27.
2. Hawthorne, F. W. (1988). Gettysburg: Stories of men and monuments as told by battlefields guides (140p). Gettysburg, PA: Association of Licensed Battlefield Guides.
3. Hess, E. J. (2009). The Trenches at Petersburg: Field fortifications and confederate defeat (403p). Chapel Hill, NC: The University of North Carolina Press.
4. Tenney, W. J. (1866). The military and naval history of the rebellion in the United States (843p). New York: D. Appleton.
5. Wise, S. R. (1994). Gate of Hell: Campaign for Charleston Harbor, 1863 (312p). Columbia, SC: University of South Carolina Press.