Fling & Pere Marquette - Original F&PM Roundhouse, Near Potter Street Station (GB162), 1880, Box: 2 - Goodridge Brothers Photograph Collection, Folder: Railroads. Goodridge Brothers Photographs, COLL-GOODRIDGE. Hoyt Library Archives. https://archive.saginawlibrary.org/repositories/2/archival_objects/21912 Accessed December 06, 2025.