AAPG Rona, "Horizontal and Vertical Lithoshperic Plate Movements, North Atlantic Cont. Margins, 1972

AAPG Rona, "Horizontal and Vertical Lithoshperic Plate Movements, North Atlantic Cont. Margins, 1972, Box: 55, Folder: 17. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/150629 Accessed November 15, 2025.