Ripley Scribner - Coe - Yale [S. Dillon Ripley and L.L. Schribner, Coe Collection, Yale University], Box: 22, Folder: 58. Sauer's Gouldiana Research about John Gould and other papers, MS 304. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/204816 Accessed July 26, 2024.