"Lower Cretaceous Stratigraphy of Mississippi" by Jeff Dorris Nunnally and Henry Florey Fowler. Mississippi State Geological Survey, Box: 11, Folder: 5. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/149267 Accessed May 02, 2024.