Ernest L. Johnson and Hiram Karns -- Invention patent, ca. 1848-1968, Box: S2/Box 33, Folder: 10. Siler Family Papers, A&M 2200. West Virginia and Regional History Center.
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Ernest L. Johnson and Hiram Karns -- Invention patent, ca. 1848-1968, Box: S2/Box 33, Folder: 10. Siler Family Papers, A&M 2200. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/174922 Accessed November 25, 2024.