United States Graphite Company, 1909-09-03, 1913-07-21, 1904-03-09, Container: Letterheads of Saginaw Businesses - Box 1, Folder: Five. Business and Industry, COL-BUSINESS. Hoyt Library Archives. https://archive.saginawlibrary.org/repositories/2/archival_objects/12029 Accessed December 06, 2025.