Tyman, John Langton, Subjective surveyors; the appraisal of farm lands in western Canada, 1870 - 1930, Box: 1, item: 13. Unpublished papers from an Images of the Plains Conference, RH MS 139. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/47018 Accessed May 19, 2024.