Explore Chicago Collections
https://explore.chicagocollections.org/records/?f1-topics=Work%3A%3ACommerce+%26+Trade&f2-topics=Work%3A%3ACommerce+%26+Trade&f3-topics=Work%3A%3ACommerce+%26+Trade&f5-types=Archival+Collections&f7-institutions=University+of+Illinois+at+Chicago&f8-topics=Work%3A%3ACommerce+%26+Trade