American Petroleum Institute, Publication of Activities (Award to W.E. Pratt - see back cover of API Quarterly Winter 1954-55), Box: 1, Folder: 37. Wallace E. Pratt papers, RH MS 870. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/33947 Accessed June 02, 2024.