National Historic Chemical Landmark: E. F. Smith Collection (Philadelphia, Pennsylvania), March 16, 2000

National Historic Chemical Landmark: E. F. Smith Collection (Philadelphia, Pennsylvania), March 16, 2000, Box: 41, Folder: 19. Personal papers of Daryle H. Busch, PP 637. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/512251 Accessed December 31, 2025.