Photographs of Minnie Wuelpern, no date, Container: Trew Family - Box 2, Folder: 3 - Margatha "Minnie" Wuelpern (Schmidt). Families, RG-FAMILIES. Hoyt Library Archives. https://archive.saginawlibrary.org/repositories/2/archival_objects/22332 Accessed December 06, 2025.