Postcard of Chas. H. Kretschmer Grocery Co. automobile, Container: Kretschmer Grocery Store and Kretschmer Wheat Germ Corporation - Box 1, Folder: One. Business and Industry, COL-BUSINESS. Hoyt Library Archives. https://archive.saginawlibrary.org/repositories/2/archival_objects/6055 Accessed December 06, 2025.