Oklahoma: Fort Sill Museum (U.S. Army Artillery and Missile Center Museum, Fort Sill, OK)

Oklahoma: Fort Sill Museum (U.S. Army Artillery and Missile Center Museum, Fort Sill, OK), Box: 7, Folder: 16. Morris Edward Opler papers, 14-25-3238. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/242310 Accessed January 24, 2026.