"Duncan G. Ingraham- Genealogy of Ingraham family (Manuscript) list of D. Jr.'s children", 2009

"Duncan G. Ingraham- Genealogy of Ingraham family (Manuscript) list of D. Jr.'s children", 2009, Box: 31, Folder: 20. Robinson-Clapp family archives, RH MS 578. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/581614 Accessed January 23, 2026.