"Foreword," in The Western Apache: Living with the Land Before 1950 by Winfred Buskirk. Norman: University of Oklahoma Press, pp.xi-xii., 1986, Box: 122, Folder: 57. Morris Edward Opler papers, 14-25-3238. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/240652 Accessed April 16, 2026.