Spiral notebook detailing developing costs (including parts ordered and labor) of Yarger's invention, undated

Spiral notebook detailing developing costs (including parts ordered and labor) of Yarger's invention, undated, Box: 1, Folder: 4. Milton R. Yarger, Inventor, Papers, A&M 4279. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/157827 Accessed December 05, 2025.