Higuchi and Michaelis, "Ion-Pair Extraction of Pharmaceutical Amines IV: Inflence of Anion on Enthalpic, Entropic, and Free Energy Changes Resulting from Phase Transfer,", 1969

Higuchi and Michaelis, "Ion-Pair Extraction of Pharmaceutical Amines IV: Inflence of Anion on Enthalpic, Entropic, and Free Energy Changes Resulting from Phase Transfer,", 1969, Box: 10, Folder: 193. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124617 Accessed February 16, 2026.