Renaissance illustrations - Spanish (Velasquez), German (Durer and Holbein), Dutch (Rembrandt and Vermeer), Box: 22, Folder: 47-49. Personal papers of Joseph M. Kellogg, PP 237. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/136819 Accessed December 30, 2024.