Saginaw Valley Telephone Company, 1907-10-01, 1908-01-31, Container: Letterheads of Saginaw Businesses - Box 1, Folder: Four. Business and Industry, COL-BUSINESS. Hoyt Library Archives. https://archive.saginawlibrary.org/repositories/2/archival_objects/12006 Accessed December 06, 2025.