Explore Chicago Collections
https://explore.chicagocollections.org/records/?f2-topics=Work%3A%3ACommerce+%26+Trade&f1-topics=Events+%26+Movements%3A%3AFairs+%26+Conventions&f4-topics=Events+%26+Movements%3A%3AFairs+%26+Conventions&f3-types=Archival+Collections&f5-institutions=University%20of%20Illinois%20at%20Chicago