References
- Alexander, R. G. (1991). Topography: General headquarters, A.E.F., Chaumont, Haute-Marne, June 1919. United States Army in the World War 1917-1919: Reports of the Commander-in-Chief, Staff Sections, and Services Volume 13. Washington, DC: Center of Military History, United States Army.
- Campbell, J. B. (2008). Origins of aerial photographic interpretation, U.S. Army, 1916 to 1918. Photogrammetric Engineering and Remote Sensing, 74(1), 77–93. doi: 10.14358/PERS.74.1.77
- Evans, R. T., & Frye, H. M. (2009). History of the topographic branch (division). Reston, VA: U.S. Geological Survey.
- Moore, R. J. (2017). The story of a World War I mapmaker: The war diary of Willard B. Prince, fifth division headquarters AEF, written and compiled at the front. The occasional papers: A Philip Lee Phillips map society publication. Washington, DC: Library of Congress.
- Murray, J. S. (2010). In the trenches: British surveyors made a crucial contribution during World War I – an accurate map of the battlefield. Fine Books & Collections, 52, 1–2. Retrieved from https://www.finebooksmagazine.com/issue/201003/battlefield-2.phtml
- Prince, W. B. Reminiscences of a topographical man in the U.S. army [The Willard B. Prince collection of World War I maps and other related cartographic materials]. Held by The Library of Congress Geography and Map Division, Folder 5, 1.
- U.S. Army Military Aeronautics Division. (1918). Illustrations to accompany notes on the interpretation of aeroplane photographs, series A. Washington, DC: War Department.