"Cultural Evolution, Southern Athapaskans, and Chronology in Theory," Southwestern Journal of Anthropology, 17, No.1, 1-20., 1961

"Cultural Evolution, Southern Athapaskans, and Chronology in Theory," Southwestern Journal of Anthropology, 17, No.1, 1-20., 1961, Box: 123, Folder: 91. Morris Edward Opler papers, 14-25-3238. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/240746 Accessed October 29, 2025.