Louis J. H. Wuelpern’s Certificate of Death, 1991-07-01, Container: Trew Family - Box 2, Folder: 5 - Miscellaneous Wuelpern. Families, RG-FAMILIES. Hoyt Library Archives. https://archive.saginawlibrary.org/repositories/2/archival_objects/22664 Accessed December 15, 2025.