Higuchi et. al, "Evaluation of Amides and Other Very Weak Bases in Acetic Acid,", 1962, Box: 10, Folder: 134. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124558 Accessed May 18, 2024.