Higuchi and Connors, "Photometric Indicator Titration of Weak Bases in Acetic Acid, The Modified Type II Plot,", 1960

Higuchi and Connors, "Photometric Indicator Titration of Weak Bases in Acetic Acid, The Modified Type II Plot,", 1960, Box: 11, Folder: 36. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124670 Accessed December 24, 2025.