Higuchi and Rehm, "Conductometric Titration of Sulfuric and Hydrochloric Acids and Their Mixtures in Anhydrous Acetic Acid,", 1955, Box: 10, Folder: 79. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124503 Accessed June 16, 2024.