Higuchi et. al, "A General Method for the Chromatographic Analysis of Mono-, Di-, and Triglycerides and the Mono- and Diesters of Ethylene Glycol and Polyethylene Glycol,", 1960, Box: 10, Folder: 146. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124570 Accessed May 18, 2024.