Higuchi et. al, "Enhancement of Percutaneous Absorption by the Use of Volatile:Nonvolatile Systems as Vehicles,", 1969

Higuchi et. al, "Enhancement of Percutaneous Absorption by the Use of Volatile:Nonvolatile Systems as Vehicles,", 1969, Box: 10, Folder: 126. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124550 Accessed December 25, 2025.