ISSC-14(a) Replies to Circular-9 Received before and Summarized in Circ.-10, July 15, 1960, Box: 88, Folder: 19. Hollis Hedberg papers, RH MS 546. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/151584 Accessed June 26, 2024.