Pratt, Wallace E.; Sydney Powers Memorial Medal 1943 - citation by E. DeGolyer - reply ("Geology is a way of Life") by W.E. Pratt, Box: 1, Folder: 55. Wallace E. Pratt papers, RH MS 870. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/33965 Accessed March 12, 2025.