"Oil Production - Its Development and Stabilization", a lecture before the Chamber of Commerce of the U.S.A, by W.E. Pratt

"Oil Production - Its Development and Stabilization", a lecture before the Chamber of Commerce of the U.S.A, by W.E. Pratt, Box: 7, Folder: 28. Wallace E. Pratt papers, RH MS 870. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/34196 Accessed December 25, 2025.