ISSC-116 Magnetic Reversals - Correspondence on Mag. Strat. Classif. of ISSC and on Draft 21 Statements in April 1976, 1975 - 1976, Box: 36, Folder: 27. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/150058 Accessed November 28, 2024.