Kathryn Shively Meier. "Weather during the Civil War". Encyclopedia Virginia. Virginia Foundation for the Humanities. Archived from the original on 31 October 2020. Retrieved 20 July 2016.
nps.gov
"Battle of Fredericksburg History". Fredericksburg & Spotsylvania National Military Park, Virginia. National Park Service, U.S. Department of the Interior. Retrieved 20 July 2016.
Kathryn Shively Meier. "Weather during the Civil War". Encyclopedia Virginia. Virginia Foundation for the Humanities. Archived from the original on 31 October 2020. Retrieved 20 July 2016.