NAS-NRC Panel on Energy Resources for U.N. Conference on Application of Science and Technology for the Benefit of Less Developed Areas, Geneva, 1963, Box: 61, Folder: 16. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/150847 Accessed June 19, 2025.