"The Telephone in Michigan" by the Michigan Bell Telephone Company, n.d.

Included in this collection are the correspondence, telephone industry records, photographs, and press clippings related to Charles E. Wilde's career. An interesting piece of this collection is the blueprints for a telephone, lines, and connectors. Also included is a piece of realia, an award Charles E. Wilde received for his fifty years of service for the Michigan Bell Telephone Company.