"Duncan Ingraham III 1st son of D.I. Jr.", 2009

"Duncan Ingraham III 1st son of D.I. Jr.", 2009, Box: 32, Folder: 8. Robinson-Clapp family archives, RH MS 578. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/581637 Accessed January 23, 2026.