Higuchi et. al, "The Kinetics of the Hydrolysis of Procaine,", 1950

Higuchi et. al, "The Kinetics of the Hydrolysis of Procaine,", 1950, Box: 10, Folder: 205. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124629 Accessed December 25, 2025.