This primary source comes from the Records of the National Park Service.
National Archives Identifier:
520203Full Citation: Amputation being performed in a hospital tent, Gettysburg; 7/1863; Records of the National Park Service, Record Group 79. [Online Version, https://www.docsteach.org/documents/document/amputation-being-performed-in-a-hospital-tent-gettysburg, April 23, 2024]