Explore Chicago Collections
https://explore.chicagocollections.org/records/?f6-topics=Work%3A%3AAdvertising&f3-topics=Work%3A%3AAdvertising&f4-institutions=University%20of%20Chicago&sort=title&f1-institutions=University%20of%20Chicago&f2-cities=Elgin&f5-types=Archival%20Collections&browse-topics=yes