Rock coves in oil and gas wells, and predevelopment and post development of potentiometric surface - Figures 21, 22, and 23, Box: 8, Folder: 20. Wallace E. Pratt papers, RH MS 870. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/34248 Accessed May 19, 2024.