Higuchi and Lach, "Study of Possible Complex Formation Between Macromolecules and Certain Pharmaceuticals. III. Interaction of Polyethylene Glycols with Several Organic Acids,", 1954, Box: 11, Folder: 122. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124756 Accessed March 11, 2025.