John G. Goll’s daily diaries relating to his oil business, 1913, 1927, 1929 - 1932, Container: Goll Family - Box 2, Folder: 2. Families, RG-FAMILIES. Hoyt Library Archives. https://archive.saginawlibrary.org/repositories/2/archival_objects/18892 Accessed December 06, 2025.