Explore Chicago Collections
https://explore.chicagocollections.org/records/?f7-topics=Natural%20%26%20Built%20Environments%3A%3ARailways&f4-institutions=University%20of%20Chicago&sort=title&browse-topics=yes&f2-cities=Elgin&f1-cities=Elgin&f5-types=Archival%20Collections&f6-cities=Elgin&f8-topics=Work%3A%3AAdvertising