Ronald J. Sullivan Photograph Collection, TL030, Box: 1; Box: 2; Box: 3; Box: 4. Northwestern University Transportation Library.
Ronald J. Sullivan Photograph Collection, TL030, Box: 1; Box: 2; Box: 3; Box: 4. Northwestern University Transportation Library. https://findingaids.library.northwestern.edu/repositories/5/resources/1290 Accessed February 08, 2023.
