IGCP US-12 U.S. Nat. Committee on IGCP, Meeting in Washington D.C, December 11-12, 1978, Box: 35, Folder: 5. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/150003 Accessed May 03, 2024.