Draft manuscript "Distribution of Potas Salts in the U.S. and Canada" by G.D. Harris (or reviewed by him), 1920, Box: 6, Folder: 32. Gilbert Harris papers, 14-5-4663. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/1932754 Accessed August 30, 2026.