Two photographs on matte board of the roof of the telephone exchange at Hannibal, MO, 1889

Two photographs on matte board of the roof of the telephone exchange at Hannibal, MO, 1889, Box: 14, Folder: 62. Personal Papers of Lloyd Sponholtz, PP 521. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/252787 Accessed December 25, 2025.