Explore Chicago Collections
https://explore.chicagocollections.org/records/?f6-topics=Events%20%26%20Movements%3A%3AFairs%20%26%20Conventions&f7-cities=Chicago&f2-topics=Work%3A%3ACommerce%20%26%20Trade&f5-topics=Work%3A%3ACommerce%20%26%20Trade&f4-types=Archival%20Collections&f1-topics=Events%20%26%20Movements%3A%3AFairs%20%26%20Conventions