Explore Chicago Collections
https://explore.chicagocollections.org/records/?f3-topics=Work%3A%3AAdvertising&f4-topics=Work%3A%3AIndustries&f1-topics=Events%20%26%20Movements%3A%3AFairs%20%26%20Conventions&f2-topics=Work%3A%3AIndustries&f5-topics=Events%20%26%20Movements::Fairs%20%26%20Conventions