Mrs. Anna M. Harrington Filson and her two brothers, Homer Harrington and Jack Harrington, at Pyramid Rocks (Monument Rocks), Gove County, KS, November 1949, Box: 1, Folder: 18. Gladys Filson Carlson photographs, RH PH 36. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/4086 Accessed February 17, 2025.