Higuchi and Gans, "The Solubility and Complexing Properties of Oxytetracycline and Tetracycline I. Interaction in Aqueous Solution,", 1957, Box: 11, Folder: 97. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124731 Accessed January 17, 2025.