Higuchi and Zuck, "Investigation of Complexes Formed in Solution by Caffeine. II. Benzoic Acid and Benzoate Ion,", n.d

Higuchi and Zuck, "Investigation of Complexes Formed in Solution by Caffeine. II. Benzoic Acid and Benzoate Ion,", n.d, Box: 10, Folder: 186. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124610 Accessed February 16, 2026.