Whipple, Amiel Weeks, Young, J. J., and W. S. Barnard. "Plan of the battle field at Bull Run, July 21st 1861." Map. Place of publication not identified: publisher not identified, [1861?]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:3f463292w (accessed April 24, 2024).