"Studies in the Biology of the Fleece of the Scottish Mountain Blackface Breed of Sheep" by Darling, Frank Fraser, 1932, Box: 4, Folder: 5. Personal papers of John "Jack" A. Weir, PP 404. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/261341 Accessed May 15, 2024.